Im working on the presentation for the Owasp EU Summit 2008, and i created the WebSlayer project site at OWASP.
The first version released is only for windows, but the source for Linux and OS X will be ready this week. Ubuntu 8.10 includes the python-qt4 version needed to run WebSlayer :)
Well now WebSlayer is officially an OWASP project :)
I hope you find it useful for your engagements
Stay tuned for the next release that will be packed of new features and improvements!