Gotta hand it to MMOs when it comes to architecture - they have some very unique problems to deal with. Sending media-heavy data back to a number of widely dispersed clients in real time has to take the cake in my book, not to mention continuously writing that same data back onto a database (you log in the same place as you logged out, don't you?)
I'd imagine the media messages they send to clients are a continuous broadcast of 3D coordinates and audio processing signals for player characters but I honestly have no idea. I'd love to learn more about it.
The network has to send you coordinates about where you and every other player are in relation to each other so your view of the gameworld is synchronized. Had you actually read what I wrote you would have understood my meaning.
I'd imagine the media messages they send to clients are a continuous broadcast of 3D coordinates and audio processing signals for player characters but I honestly have no idea. I'd love to learn more about it.