I'm using Entity Framework 4+.
Can you really instantly create some MOCK database in the schema with a few random data? Where ints, put ints, where strings, put some GUIDs or whatever...
It might assist me to to debug my application a great deal.
Goto this link and take a look only at that section "Seeding Initial Data in Instantly Produced Databases"
Here's library that can help in producing test data - http://autopoco.codeplex.com/