If you have something to say -- what freethinker doesn't? -- or if you just like to listen to others bloviate, try a freethought discussion board.  Many exist across the Internet. Here are some popular ones, just to get you started. 

• The Young Atheists Forum 
• Freethought & Rationalism Discussion Board  (formerly the Internet Infidels Board)
• The Freethought Forum 
  The Secular Cafe
• The Ex-Christian Net 
• Atheist Network Forum 
• The Arrogant Atheist Forum
• Wasteland of Wonders 
• Recovering from Fundamentalism 
• The Biblical Errancy Debate Forum 
• The Bible Forum
• Think Humanism, an Independent Humanist forum
• The Atheist Empire board
• The Sacramento Atheists and Independent Thinkers Alliance  (low volume)
• SEINE, Sacramentans Engaged In Nontheist Exchange  (very low volume)  

I love argument, I love debate. I don't expect anyone just to sit there and agree with me, that's not their job.
  ~  Margaret Thatcher

It is better to debate a question without settling it than to settle a question without debating it.
 ~  Joseph Joubert

There is no conversation more boring than the one where everybody agrees.
 ~  Michel de Montaigne