From what I understand, Greyhawk is very xenophobic. And that wouldn't logically change just because some rules are released that include monsterous races as player classes.
I believe Nash is still looking into the changes as they affect Waterdeep and considering whether or not to change the Rotunda.
Personally, I don't really think the CRT should change for
4e. This is a free form site. And, while some of the rooms are based in published D&D settings, I don't think revised rules should affect said settings. Because they're already set - now, Nash may come up with a good story for bringing the Rotunda through the changes set up for Faerun, and that's cool. But, in my understanding Greyhawk is just way too xenophobic for that.