I've been running my own Jabber server for years, but I've always relied upon the sometimes-flaky transports to relay messages to AOL friends. Now maybe, I'll be able to drop the transports for a pure Jabber implementation.
When all of you get hooked up, try adding me to your contacts: firstname.lastname@example.org.
I really hope they manage to enable s2s, so they can intercommunicate. Only being able to IM Google Talk users would be like only being able to email GMail users from GMail. The migrating users may not realize that yet, since their previous IM networks had never been so open.