AOL is about to launch its own weblog platform, dubbed AOL Journals. Reports here and here (and here too). Still missing in the picture (or have I missed something?) are Microsoft and Apple, as well as Macromedia as an outsider. IMHO, this not a matter of if but when they'll follow suit (in the case of Apple, that would count as a good addition to an otherwise largely overpriced .Mac service).
Private joke: after a journey from Blogger to B2, I'm looking forward into seeing Tristan and his StandBlog jump ship to AOL Journals ;-).