Yesterday morning we received an email from the folks behind Justin.TV. They were preparing for a big splash at the E3 show and wanted to make sure that we were in a position to handle the increased load. We assured them that we were.
Justin and his posse visited E3 and did a live broadcast (available in archive form here). Everything worked really well.
After the event, they shared some impressive statistics with us. At peak they served up 3,500 simultaneous video streams representing over 1 gigabit per second of network bandwidth. Within minutes of noticing the heavy load, they were able to increase their streaming capacity by over 400%, and they paid only for the server capacity that they needed. Once the load subsided they killed off the extra capacity.
That's how it works when you are Web-Scale!