Great video. I've gone the embedding route myself a few times and would love for it to work across browsers and OSs. It's nice that you can embed the Windows fonts like Verdana but pointless since IE on Windows is the only browser that understands the embedding so they'll have the font anyway. 
Stepping away from the browser for a moment, Windows itself is a typographic mess, and I really hope that gets solved in Windows 7. Segoe UI is a great font, but Windows still uses the old fonts MS Sans Serif and Tahoma all over the place. Sometimes it even uses multiple fonts in the same dialog (e.g. the new Vista style common file dialogs) which just looks messy.
This is especially horrible on Asian systems. Where Vista uses Segoe UI on western systems, it uses the brilliant new Meiryo font on Japanese. Meiryo is a great font, ClearType enabled, I absolutely love it. Then half the system still uses MS UI Gothic, which is a bitmap font with no anti-aliasing at all at the smaller sizes. This looks incredibly jarring. It's simply not an acceptable situation and I'm appaled that a company that according to Bill Hill's claims takes typography seriously could release such a mess.
Related, in Vista, even with IE8 beta 2, MS UI Gothic is still the default Japanese font in Internet Explorer. It's one of the first things I change in IE usually. Apparently screen reading in the browser is only important to Microsoft if you use the Roman alphabet. There are no good Asian fonts available for web designers since Meiryo and the other new Asian fonts are available only on Vista. The fact that IE does not implement CSS font fallback correctly also doesn't help here if you have a webpage that mixes Roman and Asian characters.
I also want to thank Bill for putting me onto eBooks with one of the early videos. I do nearly all my reading on my trusty Dell Axim X51v and don't leave the house without it. It makes all those train rides so much more bearable without having to drag heavy paper books around. I have however been forced to dump Microsoft Reader because its DRM activation system has now made it impossible for me to buy any more books (because you need to activate for that and I can't do that anymore). I now use eReader which has the added benefit of being able to specify the font you want to use, and I found Calibri looks really nice on my Axim's 192DPI display with ClearType.
I also use Meiryo on my PocketPC for my own Japanese dictionary application. Whenever I show that to anyone who's not seen Meiryo before I'm generally met with disbelief at just how readable it is. Big kudos to the guys who created that font.