I believe that the OCWC have already asked Piet to fill in the survey for OERBit, which I think is a very interesting platform for OER. I have to update LearningSpace soon and I'll be taking a very close look at it!
If you're using a more "out-of-the-box" Drupal it may be worth filling in the survey for that as well. Let me know if you'd like the survey URL. If more than one person reports on the same platform, Clay will aggregate the responses.