http://www.gearxs.com/gearxs/product_info.php?products_id=14618    $20  VoIP phone

I thought about getting one of these.  I don't need it, but I thought it would be cool to mess with.
Does anyone know of a free service that would route one or two VoIP phones? 
I imagine it would work with Skype, but is there a way to get it to work with Google Voice and get an outside number?
Would you have to set up an Asterisk server?

Item uses H.323 protocol



It's been a while since I thought about VoIP, and all I could remember was the Asterisk (Asterix) server as a possiblity.

Brian