features which I would ask for
a) headless runner
b) applescript may be usable but could it be integrated with ruby or other programming languages, that I way can make it a driver for my current testing flow
c) logging/debugging capability
d) and of course price it reasonably :)
I've done some experimenting with Celerity (headless integration testing with JS support) and it works quite well. Can even emulate CSS and it scales much better. One thread becomes one test. So running 50 tests in parallel on one machine is no problem. This really is a requirement for me if you want it to work with CI.
Celerity is based on Watir (similar to Selenium) and Ruby. See http://celerity.rubyforge.org/
Most AppleScript aware applications can be made to support ruby and python through this bridge:
http://developer.apple.com/mac/library/documentation/Cocoa/C...