Please note: Flex Unit 4 now includes a parameterized runner which is much less hacky than this one.
See the documentation here: http://docs.flexunit.org/index.php?title=Parameterized_Test_Styles#TestNG_Style
My old version can be seen here: https://gist.github.com/299871/b67365b772dfda48fc0c6108457ddd168bd05931