I know AOL has said that AOL 6.0 will enter beta right after OS X is released, and that it will be Carbonized. No word about AIM, but if you noticed it's been 3 months since a new version of AIM has been released, so AIM for OS X might follow up soon afterwards.
A new version of Fire came out over the weekend, it's supposed to have a lot of bug fixes, i'd see how that works.