Newb android question.  When (if) is the Samsung Galaxy Nexus coming out on AT&amp;T? I have an iPhone 4 and I'm looking to jump ship and join Samsung/Google.  I want the best out there and I think that is the Samsung Galaxy Nexus. 

Unfortunately I have a family plan and a corporate discount at AT&amp;T, so I can't really leave them.  So what is the best I can do with AT&amp;T and getting an android phone?