Google has decided that a hack developed by users of the Google Voice system, who didn't want to change their phone number to a Google Voice number, makes sense. The Official Google blog has an announcement regarding a new feature that allows you to use a lighter version of Google Voice with your existing mobile phone number, the trade off is that you will not get all of the features of a full blown Voice account. Oh yeah, and you need an invite to the system before you can get either the light or the full featured versions working. This video gives a great overview of the new lighter version.
I'm still waiting for my invite but it's also unclear what the catch might be for those of us north of the border...