This seems to be a great addition to NUnit.  After struggling with DB consistancy for unit tests we have implemented something similar, but much more manual.  This seems like an ideal solution to deal with DB consistancy.  The one issue I do see is the ability to fully test transactions without needing to model the code around a RequiresNew attribute, but what a step in the right direction.  Can't wait to take a look, thanks alot!

Check it out here