We loaded up a free iBT actual test (speaking and writing sections) in March this year, and included samples of test-takers and grader feedback and scores. Since then the site has been bombarded with visitors, and in the last month or so we have added a function to the free trial test that allows test-takers to practice recording their submissions online with Chinswing.
We have a good assortment of submissions already, so get along and check it out. Even better, jump in and try recording your own submission! One of Dean, Yannick or myself gets around to passing on some scores and feedback from time to time, but it's mostly for collaborative practice at the moment.