Jay A. Allen
As, I believe, the first .gov to use Google Apps as our enterprise software, I am (pretty) happy to report that I can't imagine NOT working in the cloud anymore.
I've almost completely weaned myself off of any local C drive, even for my personal life.
I will actually be giving a webinar on the subject, in conjunction with the ASTD DC Metro Chapter Technology Special Interest Group (chose to use BigTent) in November (see attached, webinar details to follow).
I am curious about your customer. Not having access to Google would mean no internet access at all unless the company specifically blacklisted Google - I also find that hard to believe.