<a href=http://www.flosoft-systems.com>aMock</a> is my company's mock
object solution.  We have tested it against every testing framework we
can get our hands on and it works like a champ.  The final phase (and
to be honest the first phase of marketing) is to offer $50 to the
first person that can find a testing framework (inluding yet to be
released/home made ones) that breaks it (crash, incorrect results and/
or any other undocumented behavior).   The only limitation on the
testing framework is it may not use reflection to make any run-time
modifications to code under test (aMock does this and the framework
doing it would be mutual bad in all likely hood).

If you need an extension on the 30-day trial peroid to do this send me
a note and I will mark that in our records (the trial is 100%
functional, including source code, and has no time triggered
gotcha's).  Now for the pure marketing part of this post if your also
in the market for a good ultra lightweight testing frame work you may
find our thisTest to be just the right thing.