I just recently stumbled upon PHPUnit's --bootstrap flag. I used to bootstrap each of my unit tests using a require statement at the top of the file. I always found this very tedious, but did not want to write some script to wrap each unit test. The --bootstrap flag solves this problem quite nicely.
I have updated my Crimson framework to use PHP 5.3 namespace support instead of the old PEAR style class namespacing. I did this primarily as an exercise in migrating a code-base to use namespaces. Just in case anyone was relying on the old framework code, there is a pre-5.3 branch on github.