The debs work fine under debian/sid and most deb packages work fine between debian and ubuntu and the places where they don't are by some evil design. yeesh
Did you get the Steam ones to work? At least the betas were hopeless because they're linked to glibc 2.15 or something, whereas Debian uses the forked eglibc 2.13.
that said, they are the distro with the best live-usb installer by far.