Bob Warfield, executive vice president of products at Helpstream, blogged about their success using Amazon Web Services.

Meanwhile, I can’t imagine why startups are fooling around with their own data centers. Easy for me to say, we were too just one short week ago!

Read his post on:
http://smoothspan.wordpress.com/2008/12/08/one-week-later-on-amazon-web-services/

ZDNet features their migration in an article here: Migrating to Amazon Web Services: The blueprint.

The biggest pop is clearly hardware costs. Helpstream reckons it will deliver savings of 59 percent overall by moving to Amazon. Anecdotally, Warfield noted that customers have seen a performance improvement.