Please correct me if I'm wrong, but isn't the N800 pretty similar to the N900?
To answer your question, I actually have to read Wikipedia myself
The N900 is a phone. The N800 isn't. The N810 is like the N800, but it's cuter and includes a sliding keyboard
The N900 runs Maemo 5, the N800 runs Maemo 4. This thing I did is related to the wiki article you linked in. I have no idea if you can use what I committed to build the Orbiter for the N900 - I don't have one. If you do have a N900, please try it out.
I did this because sometimes people do need the Nokia Orbiter to be rebuilt, and the process was a bitch.
Or are you working on the qOrbiter for the N800?
Nope, not qOrbiter. Just the same old boring N800 Orbiter based on sources in src/Orbiter. Sorry to disappoint.