After my last post about NUnitX I forgot to mention one very cool thing:
I've been in touch with Peli - maker of MBUnit (which with a little work can grow to become a mainstream force in the unit testing arena) and shown him my Rollback code for NUnitX. 5 minutes later he had already integrated Rollback ability into MBUnit. that says a lot for extensibility and design. Way to go Jonathan!
Future ventures in this area will include making the NUnit-Addin Rollback aware - allowing you to debug and step through your tests with automatic Rollback enabled (right now Nunit addin will run just fine with NunitX, but Rollback will not work). More to come.