A little while back PZ Myers of Pharyngula invited people to come up with a symbol to represent Freethinkers. Something simple and unique that could be used by non-believers in a similar way to how Christians have that fish symbol plastered all over everything. Quite a few good suggestions were made and now they’re having a discussion on which one folks might like to use.
Of the ones listed in that entry I’m most fond of the top three choices of which I’m most fond of the “affinity” symbol:
For no other reason than I think it looks kinda nifty. My second choice would be the “a period” symbol:
Mainly because it’s not only simple, but is also a question mark laying on its side. There’s quite a few more choices over there so go and let them know what you think would be the best symbol for us to make use of.