The Experimental section contains pages which use newer web technologies (such as interactive SVG) not supported by all browsers. I have noted on each page the browsers it should work in.
The Unfinished section is fairly self-explanatory. At any given time I am working on about a dozen pages in various levels of development. When they reach a certain stage, I'll stick them in there for you to view and comment on. Any comments you make will be taken into consideration as I develop the page.