The biggest feature I saw that yall mentioned from that IDE I'd want is the pulling of images and such in the project when you're in image tags. That would be really nice. Would be even nicer if it went a step further and worked in like PHP include/require tags and other such places.
Also on a side note, how hard would it be to toss up a mediawiki installation here? It would seem to solve a lot of the problems with lacking documentation and there seems to be enough people willing to contribute.