Okay, I basically just woke up to all this (again), so here is what I can gather. The Boston bombing suspects were identified, with one bombing victim who positively ID'd them:
They then got into a shootout at MIT when they encountered police, leaving one police officer and one suspect dead. The other is still alive and at large, and his name is Dzhokhar Tsarnaev--his brother is the deceased suspect #2.
Timeline
here.