woot!,got it installed too!

I followed these instructions

Repository: http://maemo-hackers.org/apt
Distribution: mistral
Component: main


Repository: http://repository.maemo.org
Distribution: mistral
Component: non-free



Make sure you download
maemo-gaim
maemo-gaim-data
maemo-gaim-locale-[whatever language you want to use]
maemo-gaim-protocol-[protocols you want to use]



The password is case sensitive, so make sure you enter it correctly on the keyboard of your N800.