wow - surprised nobody has replied to this post sooner!

i heard about MindTouch through the $1M wiki.com deal

I checked them out and quite frankly, was a bit disappointed with the wiki engine they are using.

i didn't find too much cutting edge in regards to supporting workflows (assuming they are targeting the Enterprise!) and certainly found having to relogin into each wiki a bit annoying.

i resorted to using wikispaces.com for a lecture and bumped into the concurrent editing issue - doh!

on my wishlist is for Google to bring the concurrent editing engine of Google Docs (formerly writely.com) to the wiki.   I have no experinec with JotSpot and they sure better not lag as much as they are with the Blogger acquisition!

that's my 2 cents on the matter!