nope it isnt.. that one doesnt work yet, it isnt able to create the config files or something..
what you can do is this though:
you install my version (http://www.psyonic.net/~cyber/maemo-....0.2-1_arm.deb), start it and set up your accounts, after that you close gaim and remove it..
then you install the maemo-ised version by Matthias Steinbauer (http://www.psyonic.net/~cyber/maemo-gaim_0.0.1_arm.deb)..

that could work

Edit:

ok, its more likely that that doesnt work
so if you want gaim on your N770, the best thing you can do at this time is stick with my version..

I'm sure Matthias is working on a working maemo-ised version though..