The official website for the iPhone 4 "antennagate" class action settlement is live, as pointed out by co-lead counsel on the case Ira Rothken. Of course, speaking of cases, if you're an iPhone 4 owner who has taken advantage of the free bumpers Apple's been offering since 2010 then you're not still eligible for the $15 settlement. Customers who meet the requirements (experienced antenna issues, couldn't return your phone without incurring costs, don't want to put on a bumper or case and either completed troubleshooting or no longer own the phone) can opt for the payout and file their claim at the website linked below. Of course, assuming you're not a stickler for that skin-to-metal and glass feel the case is probably the better deal overall, but as long as this issue is finally dead and buried we can probably all walk away happy.
Update: Turns out it doesn't matter if you scored yourself a free bumper or not, so long as you don't actually use it you can still register for your share of the settlement. So, if you took the consolation prize offered at the time, but have grown to hate it, now's your chance to make $15.