you can register .com/.net/.org/.info/.biz/.us domain names @ $4 from www.hostmysite.com Offer end: 2 Oct 2007. I registered about 5 domain names from Hostmysite and I haven't got any problem. +rep appreciated
if you want to register with privacy you can register from name.com for $5,99 but I think hostmysite's offer is the one best offers.