The HTML checker itself has been refined. In particular it treats quotes more sensibly (which should please Nik at least).
Oh - there's an experimental text-only theme which should kick in automatically if you use Netscape 4.7x, Lynx or Links (not been able to test Netscape). Those watching in colour can see it in action by clicking here. A nifty feature is that inline images are turned into clicky links. One day there'll be a proper link to this, and I'm hoping it might eventually form the basis of a version for mobile devices.
*has more features in pipeline, but only two days before school*