Thanks for the info winter.
DollarBill, if you just use software based internet sharing you should have no problems, just use a standard ethernet card to connect the modem to and the phoneline would act as your network.
Unfortunately for me and Cenalian (which I think are in the same boat) we can't just use internet sharing software to connect. I for one like my routers support for playing online games. Also even though i'm sure there is software out there that would work almost as well for computer games, when the xbox comes out I plan on hooking it up as well.
Would it be possible to say, hook a cable modem a couple computers and whatnot to the router, and still have the phoneline network see the modem on the other side of the router?
EDIT: when I say i like the router for playing online games, I should have said two people are sharing the connection to play in the same game.