I'm wondering how much can be done server side to minimize the dependance on IE and allow rendering to some of the browsers w/o XML support. Yeah, it might not look as pretty in them, but not as pretty is better than not at all.
Oh, definitely. The important logic is all in the XSLT anyways. The HTML that you produce is almost irrelevant.
What I would probably do is parameterize the include or something to that effect, using a different template based on the detected browser. So if you detect Internet Explorer 5+, spit out contentEditable, otherwise spit out a textarea or whatever.
Cool. I'll see what I can come up with over the weekend, and post it here.