[dredmorbius]

Yeah, it's reasonably light, as I said. Training and end-user usage patterns (never something to be taken lightly) are probably your biggest issues.

Then again, the user experience with the leading alternative solution (MS Exchange) is so miserable that at one organization I'm aware of, the public announcement of a migration to Google Apps for Domains was greeted with a standing ovation.

Another interesting factoid: Hal Varian, co-author of Information Rules, which largely discusses strategic use of lock-in by both vendors and users, is Google's chief economist. I suspect this is a subject the organization understands well: http://www.amazon.com/Information-Rules-Strategic-Network-Ec... http://en.wikipedia.org/wiki/Hal_Varian