Quick question that I can't seem to find an answer for...I got a google voice invite and was wondering - if I choose the option to use my existing number, can I pick up a Google Number later on if I want, or is this a once-and-done choice? I don't want to send out a new phone number email to 200 people and deal with stragglers on a product I may not even like or use, but I also don't want to gimp myself and be left stranded wishing I'd have taken the red pill instead of the blue pill. If it matters, I'm using a Droid A855 (the slide-out keyboard one) with Verizon, which has the GV app built-in. I also only have one phone number presently, my cell. I don't have a work number or landline, my cell number does everything.