Not sure that it will at all which is a huge bummer. They say in their sms video that you can send sms messages you receive to multiple 'phones' so I am guessing to a registered phone number only.

I think I am going to try to get a clickatell account and have my own clickatell-->http--->xmpp set up. Clickatell's incoming sms are 1/3 of a credit which is about 1 cent, still much cheaper than most cell phone providers.