Classic conservatism is a political philosophy whose central theme is the prevention of change in society. It often includes a certain reactionary element that wishes to revert society to an earlier (supposedly happer) time, or a set of societal norms that existed during that time, but this is not the main thrust of conservatism around the world.
Conservatism encompasses a wide variety of possible viewpoints, with different aspects being emphasized in different countries.
Conservatism in America
see also: Wikipedia:Conservatism in North America
The Heritage Foundation, an American conservative think-tank, states a belief "in individual liberty, free enterprise, limited government, a strong national defense, and traditional American values. We want an America that is safe and secure; where choices (in education, health care and retirement) abound; where taxes are fair, flat, and comprehensible; where everybody has the opportunity to go as far as their talents will take them; where government concentrates on its core functions, recognizes its limits and shows favor to none. ... we believe the values and ideas that motivated our Founding Fathers are worth conserving." This would seem to be a reasonable definition of the best attributes of American conservatism.
A cornerstone of American Conservative philosophy is personal responsibility – the idea that each individual is solely responsible for his/her own well-being; government exists solely to ensure that the rules are enforced, which includes protection from hostile external forces.
American Conservatives seem to be generally against "big government": "The government big enough to give you everything you want is big enough to take away everything you have." -- attributed to Gerald Ford 
During the presidential administration of George W. Bush, the use of the term "Neocons" has re-emerged to describe a certain offshoot of conservatism whose adherents are openly conservative but in practice somewhat at odds with some of conservatism's basic tenets; see Bush Neoconservative.
Conservative and Fundamentalist Groups
- The Heritage Foundation (US)
- John Locke Foundation (US - North Carolina)
- Patriot Post (US): "The Conservative Journal of Record"
- American Conservative: skeptical Conservatism
- Conservative Christian
- Parody Sites
Well-Known Conservative Proponents
- Buckley, William F. Jr. "the godfather of modern American conservatism"
- Coulter, Ann 
- Goldwater, Barry: would be considered a moderate today
- Horowitz, David: neocon writer, activist and commentator
- Kirk, Russell: "the father of modern conservatism"
- Limbaugh, Rush
- Malkin, Michelle
- O'Reilly, Bill: "against harmful, radical social changes and those causing them, i.e., the ACLU, activist judges, and secular humanists."
- Pournelle, Jerry "slightly to the right of Genghis Khan"... but doesn't seem to be rabid, unlike many others
- Will, George F.
- Conservative Thinking
- Free Republic: "the premier online gathering place for independent, grass-roots conservatism on the web"
- The Autonomist: by Rocco diPippo of Warren, RI
- Cathy's World: Cathy Seipp is a columnist for National Review Online and the Independent Women's Forum
- Right Side of the Rainbow: "News and commentary on law and politics by a right- of-center, gun-owning, gay Texan"
- Say Anything Blog: not explicitly conservative, but seems to lean that way
- Stop the ACLU
- 2006-07-03 Jewish Family “Forced to Move” Over School Lawsuit: "'Stop the ACLU Coalition' Publicised Home Address, Phone Number
- NewsMax: "America's News Page" (see also Wikipedia)
- townhall.com is generally described as conservative, but according to Wikipedia their mission is specifically to aid in "the fight against those who would sacrifice the individual and freedom for political gain and big government."
- 2006-07-06 The thug and intimidation tactics of the Far Right go mainstream by Glenn Greenwald
- 2005-12-05 'I Didn't Like Nixon Until Watergate': The Conservative Movement Now by Ric Perlstein
- 2005-12-02 The Political Battle over Modernity IV: Part 4 of a longer essay which includes an analysis of some of the major tools used by Neocons (note: should "Neoconservatism" be split off into a separate article?)
- 2005-10-23 David Brin writes: "Right now, the very word "conservative" is used to mask the fact that one group wants dynamic markets and measures our success according to the rate of small business startups, vigorous investment in new business opportunities, social mobility for those who exhibit honest ambition and hard work, and rapid rewards for innovation. Sooner or later, champions of markets will realize that these traits are being systematically quashed by others who use "conservative" to mask a different agenda. The old agenda that destroyed every other market system on record."
- 2005-09-27 J.E.R. Staddon writes: "...there are acres written on conservatism, but one of the best definitions I've seen is that it is a disbelief in utopia, i.e., a disbelief in the "progressive" idea that human beings, and human society, are infinitely perfectible. The problem with belief in utopia is that if you believe it is possible, then you are obliged to take active steps tio bring it about, which usually leads to the death and misery of large numbers of human beings (see Stalin, Mao, the Islamists, etc.)."
- 2004-08-18:  In the context of a book review, suggests a brief definition of key conservative values, and then states that they are contradicted by scientific findings, which explains why conservatives tend to be anti-science. (To be investigated: do the given values accurately reflect the conservative worldview? Does science contradict them?)
Many conservatives, especially those tending to the extreme (including DiPippo and Horowitz) seem to have it in for The New York Times, for reasons on which I'm not entirely clear. The NYT has recently been attacked for publishing photos and addresses of the vacation homes of Dick Cheney and Donald Rumsfeld; Rocco DiPippo retaliated by publishing similar information about the NYT's editor Arthur Sulzburger  and photographer Linda Spillers, who (with Rumsfeld's permission) took the photo of Rumsfeld's vacation home. The argument is apparently: (1) we are at war (the War on Terror); (2) providing such information in public is therefore providing aid and comfort to the enemy, (3) which is treason, (4) which is a crime punishable by death. See Conservative pundits reveal murderous plot by the Travel Section of the NYT! --Woozle 08:32, 13 July 2006 (EDT)