i've been following his chinese blog and using this for a while. the mms does works, but you have to edit your build prop and apn to fit your location and carrier (also so the Android market won't think that you're from China). I really wanna thank "baji"/octupule again for this. this was an absolute god-send to me.
I'm on sprint and what i use is attached. My mms recieve doesn't work for me, but then again it doesn't work on sense roms for me either. It might only be fixable on Sprint's side, in my case. But i can definitely send!
*Also the search button does work, you need to go to button settings in the settings. There should be an option under media button that refers to the search button. The deal now is that the search button is now a multi-function button but it's default is set to "none". But you absolutely absolutely must NOT flash the third link on the page, or you will lose your search button capability entirely. Also long pressing the search button will launch the camera app.
3G is fine.