That *would* be cool! It would only work on the phone/Plam combinations like the Treo, I guess.
The caveat I would offer is to look closely at Uru. This was the on-line sequel to the Myst series, and was the most awesome experience I have ever had in gaming. There was an active, enthusiastic fan community behind the game, but still it failed. Why remains shrouded in mystery, but the public version is that they did not get the number of participants they needed to make their sales projection, after about a month of Public Beta. Rumor has it that the decision to abandon the game was made BEFORE the public phase ever got started. My opinion, based on subsequent events as much as on the history, is that there was not enough blood and gore, violence and sex to make it in today's market. Very sad, but if you look at the games that are selling, and the stuff people watch on TV, you are kind of forced into that way of thinking, IMHO.
You can read more debate about the demise of Uru and subsequent attempts to ressurect it than you would ever want to read at places like
www.uruobsession.com or
www.guildofgreeters.com among many others.