PS3 is the one I'm saving for. Mostly for the Blu-ray player. This gen is looking a LOT better for the Xbox than last gen RPG wise so I might pick one up at some point. It just wasn't worth it for me to get an Xbox this gen because all the games I was interested in were on PS2 or PC so there was no point in getting one.
I also don't care about multiplayer, so that removes the major selling point of the 360 for me.
Points:
PS3: Blu-Ray, slightly more powerful than the 360, likely more japanese developer support, meaning more JRPGs, which is what I buy a console for.
360: Better japanese developer support than the Xbox.
Revolution: Backwards compatible with all nintendo systems. Letting me play the awesome SNES JRPG library, as well as being able to snag the 3 or 4 games for the Gamecube I wanted. Nicest looking of all the new consoles
So the PS3 has 3 points, the Revolution has 2, and the 360 has one. This is prior to the release of any of them, so I'll have to wait and see what happens before making a real decision.