I have made a livecd (Gentoo-based) with LTModem. I'm aiming at a Knoppix-like deal (more minimal) for Gentoo installations. I know of more than a few people that only have 56K connections AND the LTModem. I also am including xorg and flux or blackbox on the cd.
Still working out quite a few things, though I do have a working cd already ... anyone interested in helping out with this project contact me.