Have any of you been using this?:

http://www.magicjack.com/

I still have one last XP box running at home, and I can use it if I have 
to.  My preference is to get rid of it and run everything on Linux 
(Ubuntu, mostly).  Unfortunately, MagicJack seems to be promising Linux 
compatibility "in the near future" for several years now.

Maybe I can get MagicJack to work in Linux by running XP in Virtual Box, 
but then I'd still be running XP.  I'd rather run it natively.

I'd also rather use a different product, if there is a reasonable 
competitor to MagicJack that will run natively on Linux.

So I'd like to hear your experiences with VOIP and Linux.

Mike

P.S. The name sounds like a combination two famous song titles by The Who: 
"Magic Bus" and "Happy Jack."