I just got a Google Voice number myself and I'm trying to set it as my N900's voicemail number. I am using my N900 on ATT, and GoogleVoice suggests *004*MYNUMBERHERE# as the proper activation code, but when I hit call it tells me "Service Code not supported" . Any ideas on the problem?

In addition, is there any way to send SMS from the N900 using my GV number (without opening a browser and etc...)?