I found it amusing how awful the text (or should I say "the typography") for the introduction and table of contents from that site looks in Firefox on Linux (on my machine). I'm sure it is due to the site using fonts not availble in my installation, or something similar to that. Still, it was amusing. I'd be curious to hear if others had the same experience. In case anyone cares, I can't remember the last time I had the text on a web site look so bad with this setup. I visit a lot of sites, and I haven't had one look this bad for a long time. It is still readable, but if it was my site on web typography, I wouldn't want it to look that way.
It looks pretty great to me (using a Firefox 3.5 nightly under Linux), but then I've configured Firefox to use the Android system fonts, and unticked "Allow pages to choose their own fonts, instead of my selections above". It's amazing how much better pages look when they use a nice font, instead of whatever lowest-common-denominator font the original author put up with.