Disregard the above about Medic being the GM, I am
But yeah, there's definitely some room for another player in there. Like Iso mentioned, we use Skype to collaborate, and I have a Google Maps for our 'game board'.
You can use any online dice roller really,most of the guys use the myRPG roller, while I use physical dice I have on hand.
The gang has currently left Kalisz, but you can get filled right in no problem.