Hi Richard -
Thanks for the feedback!
Categorisation of tests via the NUnit Category attributes is on the list of future changes and shouldn't be far away.
As Simon mentioned, you can use the
ignore features in the Test UI to selectively ignore integration tests that you find troublesome. Using this feature you can also ignore an entire project (and therefore all tests within it). If you are working as part of a team, you can also keep the ignored test configuration file under source control so your teammates can share it.
Of course, as a long term goal it's also worth trying to get integration tests running under NCrunch - This should always be possible, though depending on your tests, it may not be possible to do it overnight :)
Cheers,
Remco