Hi all,
I just wanted to let you know that I added a page on the wiki that is a translation of some of Marc's slides which indicate how to use the define-type special form, and most importantly lists all the options available (with some exemple code).
link: http://dynamo.iro.umontreal.ca/~gambit/wiki/index.php/Define-type
I think it could be usefull since I don't believe this information appears in the official doc.
David