Yes that is right, it will come in stages, everyone already on the list now will receive coins during each week of airdropping. And people that missed out the first time can still get in on the fun by signing up with their address at http://bitcointalkcoin.org

I do scan each address and check to see if they are generated from the same account as another one. That is actually the problem I am running into right now, this means it is hard for someone to scam extra coins.

Yes as far as I know there will be 28 million given away from the airdrop, 1 million given away inside of the IRC channel and on Twitter/Reddit and we are paying a developer to update and maintain the code as well as add in some new services that we KNOW you guys will think are awesome. The developer will not be dumping his coins when he gets them, he likes this coin a lot.