In all the tech groups that I have been a part of, some version of Wiki (some homegrown app before there were Wikis, and Twiki later) has been in use for collaboration. I actually do believe that it increases developer productivity. For one thing, it gets rid of Microsoft Word and often along with it, the suits. It also stops misuse of email, use of bloatware, etc. Of course, this is not to negate your point, since I am only talking about techie work and collaboration.
--ravi
-- If you wish to contact me, you will get my attention faster by substituting "r" for "listmail" in my email address. Thank you!