Does Magma transfer files over your local LAN (PC to 360), or over the net? I've always had problems linking the PC to my 360 for media center type stuff... the router hates to do it, or something.
I'd hate to get an XNA subscription once we hit open beta only to find out that my PC refuses to talk to my 360 and thus it's wasted money. If that's the case, anybody got a guide for making the two cooperate?
(I'm keen on XNA for indie game development, too... the upcoming open beta is just icing on the delicious cake.)