Great addition to KompoZer 0.8b3 I hope to see more of: a
split-screen view of code and HTML. Its a terrific way to see what's going on behind the scenes of the code that you're working on, why individual code bits are acting up, as well as learning more HTML functions by letting KompoZer show you how its done. Another program on the site
Web Design Toy does this as well, although to a much lesser extent and really in one direction: code -> preview.
This is not yet available in KompoZer Portable (v. 0.7.10) because I think its alpha/beta stage, but I hope it will be a feature in all WYSIWYG editors. Anyway, very happy to see some activity on the KompoZer project.
More on this feature and some other recent changes.