The link below is to the web site of "The First Church of Atheism". If you poke around a little, you will find that this group has no congregations, and is not intended to lead atheists, but is rather a device to grant atheists access to things that only religious clergy have access to. It is a way for atheists to handle marriages, funerals, commitment ceremonies, etc. without having to deal with religious clergy. Still, it is a legitimate church.
Personally, this bothers me on several levels. First of all, marriage, funerals, and commitment ceremonies are not needed as a legal institutions. These are all social and cultural constructs, and there is no legitimate state interest in any of these things. All of the things that these institutions allow could be allowed without any ceremonies, or other religious entanglements. The church longs to be a part of the government, and that is why these things exist as legal institutions. They are cultural and social constructs of religious nature. We, as atheists, should be trying to fight these things as being simultaneously legal and religious constructs, not creating our own constructs to gain access to these things via the religious rout. That is us bowing down to the demands of the church, and it encourages the church to continue it's behavior.
Secondly, it makes atheism sound like a religion. Atheists have nothing in common with each other besides their lack of faith in a god. All beliefs not of god are open to us. Two atheists can easily be as different from each other in terms of personal beliefs and philosophy as people of wildly different religions. The idea of having a church for us, as if we are all sheeple with a uniform set of beliefs, and with the need to be preached to is completely ridiculous, and spreads a false idea about the nature of atheists as a group.
Personally, while I can understand why some of us would do this -to dodge the church in certain legal matters- I think this is the wrong way to do it. What do other atheists think.