Apparently Playstation is in the works of a new online experience called "Home". It is somewhat like second life but made for the PS3 and PSP. It allows its users to free roam throughout its common areas and even create their own. Personally I like this idea and I hope that Nintendo will get a jump on a project for an online world where in you could use your Miis *upgraded Miis of course :P* to roam through tons of online worlds. Of course in retrospect this could just be a very small thing at first. Work mostly on the new Miis, make a few dozen rooms *maybe seperated by country*, and then send it out as beta so they can get all the quirks out and send updates frequently.
Here is the place I found out about "Home".