Matt has released a new version of his Picross game for the Nintendo DS. Release notes:

This is mostly just the bugfix version that I promised like two weeks ago. There’s also 25 new puzzles, plus I fixed times not saving properly and the issue with duplicate puzzles that everyone was getting. I also cleaned up the code a lot, so I’ll try and release the source when I’m done with that, because, well, open-source is rad.

http://www.cidrick.org/picrossds/