Well we held out hope that Asa would stay in his crib until the end of the summer, but it didn't happen. We had to transition him to a "big boy bed." He's done great so far. Of course, the first night he was up until 1am (not crying, just up playing with his toys).
Ellie has also transitioned to rolling over in her crib. When Asa learned to roll over it kind of freaked him out and he would cry, but Ellie just rolls over and smiles at the ceiling fan until we come in and get her. Never a dull moment with all these new transitions going on.