I'm betting we won't. Justin.TV has supported more than 700,000 simultaneous viewers already. As cool as I think Wolfram Alpha is, I don't think the launch will get that many viewers.
I think he's referring to the bandwidth needed on the broadcast side. It's not much, 300 Kbps up will do, but there are plenty of times where people do these events on shared connections etc. Always frustrating.
Ok, that's a good point - it's always frustrating for us when people try to broadcast on a connection that really can't handle it.