Bluefish is cool. Trying to decide between bluefish, jEdit, notepad++, pspad and Subline Text at the moment.
Each has cool features, and yet each seems to be missing something. But I figure I need to pick one and stick with it - switching between them is confusing my brain.
See also: http://net.tutsplus.com/articles/web-roundups/22-neat-code-editors-for-windows/