MANDATORY UPDATE to 1.0.0.1
UPDATE BEFORE BLOCK 85.000!
Greetings ATH Community
We, the ATH-team, have decided to restructure our rewards in preparation of adding PoS (or something very similar, a better solution might present itself). The new reward system will apply from block 85.000 and higher; we have removed the superblocks entirely and lowered the total coins generated in the PoW-phase by 33%. The new scheme is as follows:
New Scheme
Reward Times Total
--------------------------------
10 x 85.000 = 850.000
7.5 x 65.000 = 487.500
5 x 100.000 = 500.000
2.5 x 250.000 = 625.000
1 X 500.000 = 500.000
--------------------------------
1.000.000 2.932.500
Block total is 1.000.000.
This new scheme 'frees' nearly 1.6 million coins from PoW which can now be used for PoS (or another stake-like reward scheme) without increasing our total coin supply.
Also we are pleased to announce we integrated our IRC-channel in the wallet, you can now chat with other ATH-users without a client or via a webservice. Unfortunately it turned out the open source code many wallets base their chat upon was quite buggy. We felt we could not release like this so we decided to rewrite most of the server implementation. Because we feel the channel is the most important and should have focus we opted for not displaying private messages in separate tabs, but in a single one. For this same reason we are not allowing you to join other channels. If you want the real IRC experience you should install a real IRC client and join us in #atheistcoin on freenode.net
There is 1 known bug left in the private message tab, but since we only have little time left before block 85000 we decided on releasing anyway and pushing the fix to the next wallet release.
Known bug in IRC: Wallet crashes if you receive a private message AFTER changing your nickname, and only then .. so just don't change your nickname 
New Windows Wallet
New Mac Wallet
New Linux Wallet/Source
IMPORTANT! :
Before upgrading: remove ALL files but your wallet.dat (it is always wise to make a backup of your wallet.dat before doing anything)