[Secret Squirrel]

I'm still not entirely sure on the details of this one. There seems to have been a release at C66 (or at least it's mentioned), and there may be a limited-edition with some kind of production DVD.

http://anison.info:8080/data/source/14197.html
http://www.clubhobi.net/special/hobirecords_hotline/
http://www2.hobirecords.com/product/55