I don't think this is something justin.tv is happy about because it kind of transforms "broadcast yourself" into "share your cable subscription with strangers" and inevitably leads to a conflict with Fox+ESPN+friends [and possibly with cable/sat. providers too]

It all comes down to bandwidth. It doesn't exist and the situation is not improving, I'm 100% with Matt here. Even ESPN's premiere 360 offering pretty much sucks, let alone Justin's streams: they're basically backups for people who don't have TV access (on the road, in another country, etc).

Security-minded, TCP-dominant, firewalled to death "Big Internet" is simply the wrong platform to stream live HD video. Having worked at an IP-based HD video surveillance startup I was amazed at how hard it was to reliably push high-def streams over TCP/IP even within a large local enterprise network. Most of our IP was all about bandwidth management. I honestly can't even imagine what would it take to stream even CNN to all their viewers, let alone superbowl.