Atlassian has posted a JIRA test tracker loaded with our SF data dump at http://jira.python.atlassian.com/ . Thanks to them for putting the time and effort in to do this!
I know some people don't like the idea of us considering closed source applications (written in Java no less), but this is about our productivity, not ideology. We use Perl still to build our docs, for instance. I personally just want a tool that works well and raises my productivity. And as long as we can get out all of our data to switch if for some reason we are not happy I am happy to consider them.