Edit: Fixed! Thanks goes out to Sean Swayze for letting me run rampant on his shiny new Intel box.
Adium 0.88 is basically ready for release. It has a nice shiny change set, including being a universal binary for our Intel Mac friends. Unfortunately, there's a remaining problem: on the MSN protocol on Intel Macs, file transfers which work in Rosetta mode don't work when running natively. Further unfortunately, we don't know what the problem is and don't have any Intel machines for testing.

The AdiumTrac ticket on the issue is #2775. I'm ready to have a Universal binary out there, so this regression will remain if nobody can fix it... If you can help, please do so.