But why? Not that attendance here precludes contributions to other sites, of course.
We (Atheist Republic) are not alone. Examples..
http://aintnogod.com/ipb/page/atheism-news.php
http://www.thethinkingatheist.com/forum/
http://atheistforums.org/
And the Atheism Forum on Topix.
Then there's all the local forums too, e.g....
http://www.meetup.com/group-HSNM/
I joined AR because I found the site simple and quick to use with little advertising and the company here is good. The concept appeals to me and the site appears to offer some help to those who have problems with religion, or who simply have questions religionists can't answer. AtheismUK sees few contributions at the moment and some sites seem so busy that there are many posts to read before contributing. My time for this is limited.
Subscription Note:
Choosing to subscribe to this topic will automatically register you for email notifications for comments and updates on this thread.
Email notifications will be sent out daily by default unless specified otherwise on your account which you can edit by going to your userpage here and clicking on the subscriptions tab.