Well, not what I'd call "work," anyway. Comedy Central, no. CNN, no. Anything that puts up a pop-up like window with WMV in it, no, doesn't work. In other words, it doesn't do javascript, I guess.

Oddly enough, CNN works in Internet Explorer!

What I've done is construct two Automator apps: one that switches WMV into the Disabled folder, and one that puts Flip4Mac there and disables WMV. If I'm in Safari, I have to quit and relaunch it, but then it works. So, with WMV in the Internet Plugins folder, I can watch CNN, the Daily Show and some others in Safari. But with Flip4Mac in that folder, I can use it for some sites, but more likely with my iApps. (I have WMV Studio, so I can import Windows Media into iMovie or Final Cut Express, and then edit it.)