One of the better startup business plan frameworks I've come across was one Dave McClure included in his post Startup Metrics for Pirates (http://500hats.typepad.com/500blogs/2010/01/startup-metrics-...). Check out slides 26 and 27 - the One Page Business Plan.
I work with the guys who have developed SesameVault; thanks for the post!
We have been working on the service for quite some time and are very excited to begin offering it to everyone and anyone via SesameVault.com. Just a little background and as hinted on the home page, we got our start working with large corporations who also use the same SesameVault service to power their exta-/intranet apps and services.