Check out amp bisect with amp (http://amp.carboni.ca). It’s more powerful than git’s bisect, but at the moment only works on Mercurial repositories. It’s worth looking at (amp bisect --help) so you can see what a different take on bisect is.

Actually, the help info for amp bisect is old, so just look at the arguments. Basically, it lets you jump from revision to revision marking each revision as good or bad based on either a ruby file that is run on each revision or run any shell command. It is much more versatile than Mercurial or Git’s bisect.