Okay, so I went and installed scratchbox in a 32-bit VM.

pymsn and python-crypto are two things we need but are not packaged. They all build and install happily in scratchbox, but that thing is making me crazy so I don't think I can get them packaged myself. I'll try to free up some space on my tablet for the development stuff and see if I can just install it all from source there (and therefore actually test the thing). GCC doesn't seem to exist for the tablet in any easily accessible form (although it comes AMAZINGLY close to), so I guess I'll have to get creative or figure out how to build a Maemo-ified debian package from scratchbox at least once.

Oddly enough, though, I think this may be the easiest way since then I don't need to worry about having a million different python interpreters bouncing around...

Edit:
OMG this man is my hero!

Edit Edit:

Okay, adding that repository (for bora!) is a bit scary, but the one package I needed (python-crypto) and a few of its dependencies which are only from there (python-central, which we don't actually seem to need but it shuts apt up) seem to operate just fine.

Also need python2.5-pyopenssl and python2.5-dev.

Now pymsn, telepathy-python and telepathy-butterfly can be built and installed from source. Awesome! Still not appearing in the chat client, but that shouldn't be too hard... Just need to add a profile to the rtcomm profiles directory and cross my fingers!
Now all we need is a Debian packaging ninja to make this super easy for anyone!

It still needs some love to tidy up the loose ends, since we lack icons and whatnot for rtcomm.