Er, Google just controls the Chrome and Android ports of WebKit, not the Mac, Windows, or iPhone ports. They all have their own media frameworks which are separ

Er, Google just controls the Chrome and Android ports of WebKit, not the Mac, Windows, or iPhone ports. They all have their own media frameworks which are separate; the Mac and Windows Safari ports use QuickTime, and thus support whatever codecs QuickTime supports (so, you can install a Theora plugin, and presumably VP8 once it's released), while Chrome uses a modified version of ffmpeg, and I'm not sure what the iPhone or Android ports use.