I have updated the ObjectGraphAssert and TimedTest extensions for NUnit 2.2.2.
You can get them here
per the read me...
ObjectGraphAssert - allows you to compare 2 objects via all their properties, and the properties of all children in sub collections.
TimedTest - a time limited test. This helps keep your long running tests from going over a set amount of time.
There only needs to be one change in the current source of NUnit (2.2.2) to support this version of the timed test. In the TemplateTestCase class, change the method signature of doTestCase from private void to protected virtual void.
Happy Testing