We have a slimmed down version of SimpleTest 1.0.1beta2 in my repository ( https://4si.devguard.com/svn/public/simpletest readable by anonymous, get commit rights by contacting me ). The browser now supports uploads. Now every tests starts from a fresh default.profile Drupal install. There were serious cleanups. I expect simpletest to be submitted for core inclusion this weekend. Remaining tasks are more cleanup and more slimming down and updating the slimmed down code to RC1.