Good experiences continue to abound in our use of the (still young and growing) Roundup issue tracker. I've added a couple of new major object types: Projects and Documents. Projects are a way to tie a collection of issues (and now documents) together under one object that houses its own set of data. Documents are a way for us to move our scatterings of notes that have populated FOUR previous systems (not to mention the never-finished mega-project-and-contact-manager I was working on) into a single place that's stripped down, fast, but still usable. Wiki's have been too haphazard, and we've had some serious speed issues with Plone and even the old Zope Tracker on the same box we're running Roundup on. It's a testament to Ka-Ping Yee's design, and Richard Jones' execution of those designs, that Roundup has proven to be so flexible.
Sigh... There were some good documents in the Software Carpentry Archives that don't seem to be available any more. Even the wayback machine is having issues finding them.