Here's a few good Causes to join via the Cause application:
End The Fed: http://apps.facebook.com/causes/69070?m=08824&recruiter_id=14101599
Bring ALL Our Troops Home: http://apps.facebook.com/causes/69068?m=08824&recruiter_id=14101599
Repeal The 16th Amendment: http://apps.facebook.com/causes/20406?m=99f9c&recruiter_id=14101599 (the guy who made this cause explained the 'Positions' kind of crappily, but the title of the cause gets the point across)
End The War On Drugs: http://apps.facebook.com/causes/184?m=08824&recruiter_id=14101599
Repeal The Patriot Act: http://apps.facebook.com/causes/857?m=08824&recruiter_id=14101599
No War Iran: http://apps.facebook.com/causes/857?m=08824&recruiter_id=14101599
Make Poverty History - Promote Free Trade: http://apps.facebook.com/causes/12553?m=99f9c&recruiter_id=14101599
Repeal Roe v. Wade: http://apps.facebook.com/causes/106320?m=08824&recruiter_id=14101599
Repeal Minimum Wage Laws: http://apps.facebook.com/causes/57032?facebook_url=true&m=7b28f&recruiter_id=14101599
Withdraw From The United Nations: http://apps.facebook.com/causes/57032?facebook_url=true&m=7b28f&recruiter_id=14101599
Stop Foreign Aid: http://apps.facebook.com/causes/12953?facebook_url=true&m=7b28f&recruiter_id=14101599
Improve Schools: Abolish The United States Department Of Education: http://apps.facebook.com/causes/50386?facebook_url=true&m=7b28f&recruiter_id=14101599
And, of course, I would be remiss without posting this one--
Ludwig von Mises Institute: http://apps.facebook.com/causes/4055?facebook_url=true&m=7b28f&recruiter_id=14101599
Have fun. :)
"Anticapitalist theories share in common an inability to take human nature as it is. Rather than analyzing man as a complex creature, anticapitalist theories tend to focus on what the theorist wishes man to be." - Isaac Morehouse
To which I will add:
Classical Liberalism
Anarcho-Capitalism
Market Anarchy
In Memory of Murray N. Rothbard
Alliance of the Libertarian Left
Confederation of Agorist Individuals
Aristotelian Liberals
and Austrian School of Economics
And for those in my backwards neck of the woods: Southwest Iowa Libertarians
Market anarchist, Linux geek, aspiring Perl hacker, and student of the neo-Aristotelians, the classical individualist anarchists, and the Austrian school.
Heteredox Economics
Economics: Critique and Dissent
Political Atheists Blog
Lysander Spooner and Frederic Bastiat appreciation groups
Pro Christo et Libertate integre!