Have you seen this?
http://www.codeproject.com/aspnet/I3HTree2.aspIt looks promising.
We actually used an ASP/PHP tool by CityBusinessLogic. I really liked it. I figured asp.net would have more options (being newer and all).
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.·`TCH
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"When the debate is lost, slander becomes the tool of the loser." - Socrates
Vita contingit, Vive cum eo. (Life Happens, Live With it.)
"Life is not measured by the number of breaths we take, but by the moments that take our breath away." -- author unknown
"De omnibus dubitandum"