I tried ebuddy and was not impressed any other suggestions?
Nimbuzz works pretty well for me, but there's some other popular ones out there also.
Meebo I think is one of them (if not its a music app... lol).
FYI - Nimbuzz does: (and also has a PC client)
VZ (3 protocols)
And Skype (from your droid, make skype calls over wifi)
Only wish it did XMPP and I'd be all set, might try to find another app that's as good but has XMPP also.