Will DebTorrent work with other distributions/Ubuntu?
Yes, (I think) but not very well (yet). The current DebTorrent uses some additional information that is not yet stored in the Debian archive Packages files. This information allows DebTorrent to break up large files into multiple pieces, as otherwise every file will be a single (possibly very large) piece. Not having this information will reduce the effectiveness of the downloading of DebTorrent. Eventually, this information will be added to the Packages files, so that anyone hosting a Debian-type archive will be able to efficiently use DebTorrent.