I see...
Well for internet data transfer you can do it several ways, easiest being opening up the web-dialog and reading data from that, the interactivity is a bit limited but it has all sorts of uses .
I used it for automated plug-in updating, so when I upload a new script the plugin on users end can update itself without file transfer.
Another way is direct UDP/TCP connection, if you add another file to SU then Ruby can connect to other people directly.
I used this for a small multiplayer game experiment, and it works quite well, tho setting up p2p connections it not without it's faults.
But a friend is doing an upgraded version with a user database where people log-in, chat, multiplayer game lobbies/lists/scores, that may take a while tho.
There was also quite some talk of interactive modeling, but the biggest problem is Ruby still hasn't got the full access to SU, so the synchronizing would probably haveto rebuild the full geometry on the other end(not an ideal solution with bigger models).