I've been looking at this too and a lot of old PS1 games are currently becomming available on the PSN I believe it'll be a matter of time before Sony release a service patch update what will update the drivers of the console/bios and allow it to play downloaded ps2 games. If I was Sony I'd do it to try and compete with the xbox arcade system. I doubt they'll be able to give you backwards disc compatability though which sucks. Probably involve a patch in the game files too to make them readable by the ps3 console. The question is with the life expectancy of the PS3 not even being considered as to when it will be replaced we have to ask how long will it take before Sony do something like this?