Some good news, I got my Google Voice invite in last night.
Today, I figured out how to set it as my cell voicemail.
To those using Google Voice, it is simple to set up. You just have to type in *71 followed by your GV number and then hit send. As soon as it connects, you are set up to use GV as your voicemail. To switch back to VZ VM just hit *73 send.
Also, if you use the mobile site
www.google.com/voice/m your GV number will call you then call whoever you want. Using the VZ favorites, this can keep minute use to a minimum.
Any questions, or tricks or things you want me to try, just ask.