No I haven't seen something like that myself. With snapsis you can do this:

http://www.learninglane.nl/Home/tabid/697/language/nl-NL/Default.aspx or this: http://www.rsgsl.nl/Onzeschool/tabid/179/language/nl-NL/Default.aspx

Above is quite simple, just make the LI elements floating within the containing UL.

What you want is also possible with snapsis (probably you can do this with any UL approach), but you need to structure your DNN pages in a certain way as well:

cloathing & gear has four child pages: Men's, women's, ...  under Men's you add all the different items: Jacquets, etc

With css you make your second level li floating, the third level ul you give it the same width as the second level li, the second level ul becomes visible on mouse over of the first level li.

Not too hard, if you know your way around css, otherwise you will be in for a bumpy ride, but you will learn a lot and that is cool too ;)

Good luck,

Peter

Peter