I've now created a "stable" branch of the partcl svn repository that tracks a released version of parrot (currently 0.8.1). The download instructions for partcl now show you how to get a combination of parrot & partcl that work together.
Hopefully after every parrot release, we'll be able to update our stable branch to track it. Unfortunately, due to some issues that cropped up near the end of the 0.8.2 development lifecycle, we missed that release.
I'd definitely be interested in feedback, especially from folks that use tcl on a regular basis.