Wikipad has announced a strategic parternship with OnLive (I can't believe they're still around), to bring "AAA high-end PC games" to the Wikipad tablet line. Basically, you just download the OnLive app, and it can stream any number of games to the device. That's it.
So if you have an OnLive account and happen to have a Wikipad, here's something to use with it. In the future, the service will apparently extend to the Gamevice peripheral, which will be a much bigger deal if it manages to bring PC streaming to the iPad.