Mozilla-based Nvu 0.2 is a web editor that I just came across. I haven't tried it yet, but it looks like it might have a sweet feature or two. Most notably the ability to extract inline styles and export them to a single document. Considering the amount of junk HTML I've had handed to me lately, this might come in useful. Hopefully it's as easily extensible as
FireFox is. It's originally made for the Lindows platform (ugh), but there are also
test binaries available for Windows and Linux. I'll have to try it out and see how it performs - since it's a 0.2 test release, I don't expect it to work 100%.