Mike Haggar has just released PSPicross v0.2 for the PSP, here is what he had to say:

This game is made for the psp-news coding competition. If you like it then please vote for it.Picross (a.k.a. nonogram, pic-a-pix, griddler, etc.) game for the PSP. Made in LUA. You'll need LUA 0.11 or better to run this game. The script is a uncommented mess, but take a look if you want to. Feel free to send me improvements if you make some.

Features:

• More then 120 puzzles included!
• Browser for choosing puzzle files.
• Puzzle editor for making your own puzzles.
• Guide that explains the concepts of Picross.

History:

0.2:

• First public release, hopefully with most bugs fixed.
• Fixed nasty time bugs.

0.1:

• Internal release.