You guys are really blowing this out of proportion. All Todd said was "If this was a perfect world, we could". Which basically means no or not anytime soon.
The big obstacle is Microsoft and Sony, they will not allow it without monetary compensation. As Povuholo said, it cost about 40k just to patch the game, adding an endless stream of extra content is not in the realm of possibility unfortunately.
It really comes to down who will host it, I don't see MS doing it unless they added in with the cost of gold, because they don't like doing things for free. If the platforms become open (which they will at some point), BS will just have to host the content themselves or maybe integrate steam like PS3 did with portal 2 and deliver the mods to consoles that way. They would also probably have to have a warning saying them and MS/Sony are not reliable for what mods you add to your console... this would make it unnecessary for MS/Sony to have to test all the mods like they do with patches which adds to the cost.