have you guys gone to touch.facebook.com???? it is almost as good as an app... I use it mostly, so what I do not get a posted from N900 it does what I want it to do.
touch.facebook.com sucks man, you can't even comment on bloody pictures, i agree it is some times handfull, but it can't be a real fulltime facebook client.
A Facebook application is on my list of possible future projects, once I get cuteTube fully up to scratch. As an idea for my next project, it is currently competing with a MythTV application.
I doubt we'll ever see Gravity on Maemo (at least not a Maemo specific version).
FYI, your cutetube is awesome!! and i would like to suggest for your facebook project name is "cuteface book". nice right???