ive researched this a bit more. this is actually not an issue with channel9 per se but appears to be some sort of config issue with ie8b2. the links work fine on vista and xp and also in firefox under win7. but for whatever reason they've stopped working in ie O_o this also applies to other places (sites) where wmvs are present, both as links and embeded.
whenever a link to a wmv file is pressed, i get a cant display page error. if the wmv is embedded, i get a broken image icon..
anyhow, c9 is not at fault