Do you hate the Bike Shop?
I have been hating the demo company for Microsoft CRM called Adventure Works Cycle for the past three years. Sometimes the analogy of a Bike Distributor is missed on most people. (They can't make the jump from their company to a bike company.) And cleaning out just some of the data is such a pain, for me it was faster building my own demo image, which made it a pain to share with co-workers. So when building a demo from scratch the other day, I was going to go down that path again, when behold... Run the SampleData Wizard again. One of the options there is to REMOVE the Adventure Works Cycle demo database, so you have a clean database. It is a VERY fast way to be able to start building a demo for your custom demos.