Also, there's something a little odd for those of us planning to play on XBox 360 and try downloadable content:
QUOTE("Pete Hines")
Being able to charge something for it allows us to dedicate more resources to it than we could in the past and be able to bring out things on a consistent basis.
It seems you'll have to pay for the priviledge of downloading content! Whether this applies to the PC as well I don't know.
Credit to Kaleem of the forums for spotting this before me.