After following the suggestions posted elsewhere on this forum about liblzol and libdirectfb-1.0-0, I was able to get boxee to install, using apt-get, under ubuntu 9.10. That's the good news.
The bad news is that, although boxee appears in the applications menu under sound and video, starting it produces a black screen. It stays black until I wiggle the mouse around, and hit a few random keys. At that point, the ubuntu screen comes back. There's no indication boxee ever ran.
Anyone have ideas?