It looks like Google has resolved the biggest issue users have had with its Voice service, having to switch to a new phone number. Yep, now your existing phone number will do just fine. Still, using Voice with an existing number means using a "lite" version of the service, where users mainly get to use Google's voicemail service. Anytime someone leaves you a voice message, it gets stored in your Voice account, where it's transcribed.
What's more, using this stripped-down version means users lose some of the service's most impressive features, including the ability to have one phone number directed to all of a user's phones in a manner of their choosing.