I haven't been able to find a plug-in or filter to do this, but I was turned on to an external box that did wonders and saved a shoot for me. It's called the Cedar DNS1000. We rented one for about $100 locally. Buying the box is WAY too expensive. Give it a try next time you need to remove echo or reverb from a recording. I wish they could put their technology into a plug-in. That would be killer!
Troy Witt, President
Take One Productions, Inc.
http://www.TakeOneDigital.com video production & webcasting