Getting VoIP redirected to my cell phone

I think it is doable with a single VoIP account and a cell phone. Basically, I would need to have a VoIP number that redirected all incoming calls to go back out over my VoIP account to my cell phone. It would use in and out minutes, but it sould be doable with Asterisk since it is just diverting one call to an extension that happens to be another number.

I am definitely going to try it at least once just to see if I can do it when I get to Canada and have a VoIP number.