Well, I got the * and # keys functional, and the 0 key now understands carriage returns, but there are a couple of issues:

1. I haven't figured out a good way to interpret shift.
2. The font set on the N900 apparently doesn't have extensive unicode support, so I was unable to use decent characters for space, carriage return, or shift. The alternative would be to have custom icons. If not obvious by now, I'm not an artist, so that won't be coming from me.

Now its time to pull in ossi's changes to see what progress he made and start working on a settings menu and play with navigation buttons as well as padding.