Howdy,
I've posted another batch of free 7x7 squigglies/jigsaws/dusumohs at
http://www.bumblebeagle.org/dusumoh/
Personally I find 7x7 the most enjoyable size for these. With the previous ones posted, I've got around 400 with 7-hints and 50 with 6 hints. The new ones use regions that are "boxier" than what I've been using in the past, which I think makes them slightly more difficult.
Bob H