This is quite cool—Eastercon is live streaming selected panels via UStream... and right this moment they’re streaming Miltos Yerolemou (Syrio Forel) going through fight choreography (with a friend of ours, no less—Jo, a historical re-enactor, member of the Brotherhood without Banners, and an all-around awesome person). John Bradley (Samwell Tarly) is also on hand!
It looks like the next panel being streamed from Eastercon will be a Wild Cards panel featuring George R.R. Martin, so stay tuned!