Why Do Microsoft Webcasts Have To Stream?

The MSDN Webcasts Weblog is online. Since I am doing nothing but whiney posts this week, then I’d like to ask: Why can’t we download the webcasts for offline viewing?

Bill has me salivating over the Personal Media Center. I started to imagine myself downloading MSDN TV, Channel 9 videos, and TechEd webcasts to watch at my leisure, away from the desktop. There are just two problems with this dream:  

1. The Personal Media Center isn’t for sale as yet.
2. The Microsoft webcasts do not download as a file I can save, they only stream.

[Updated with MSDN Webcasts new URL].