One of the two goals for the Bug Bash is to write more automated tests, specifically, tclwebtest tests. I have (finally) updated the tutorial to include a sample tclwebtest test case, so that we can start taking advantage of the work Tilman and Peter have put into tclwebtest and OpenACS integration.
It's at the end of https://openacs.org/doc/openacs-HEAD/tutorial-debug.html. If you will be attending the bug bash, please have a look.
The other goal for the bug bash will be to start tackling the 150 or so Pri 3 bugs outstanding in core and maybe some of the other packages.