As for wireless, no, it won't be supported initially. In the last page or two if the original thread, some people started talking about it and linking protocol information, however:
xbox360 chatpad, awsome backlit mini keyboard
So eventually we might support it. Also, there's already a third-party wireless controller driver, I think, called x360wc. If you Google it, there's a tripod site that claims to have English source code, BUT BE CAREFUL NOT TO CLICK THE BIG DOWNLOAD BUTTON. At least when I went there, I got an ad banner with a download button that presumably takes you places you don't want to go. The actual content of the website presumably has legitimate source code, though, and the original Japanese source should also be around.