A complete rebuild takes two hours on my slow PC, I don't even dare to think about doing it on the n800.
Well, I got this value a bit from everywhere (looking at specifications, google, and mplayer build options)
Only tried on scratchbox 1 / bora. Maybe the chinook stuffs doesn't segfault.

I've put the examples/demos in a tarball, look in developper subforum. It's really worth it.