I finally got a hold of a used copy of Lumines today (YAY!), was really starting to think I may have to buy a new one. Doesn't seem to be a lot of them traded in anywhere, usually a sign of a really good game. :) With the Lumines purchase that pretty much covers my PSP want list (I have Untold Legends, and Wipeout already). Although Hot Shots Golf comes out soon, and will probably find its way on the must buy list.
I tried Pac-Pix (NDS) this week for a bit (just the first chapter), and enjoyed it. It's a fairly simple game as Pac has gathered all the ghost in a book, but unfortunately gets sucked in himself. You have to clear the pages (ie. levels) of the ghost to advance to the next. Each page has it's limits (number of Pac-men you can draw, and time) that you have to work within. You control Pac by drawing him on the screen (a set movement, think of it like graphitti on the palm) he moves whichever way he was facing when you drew him. You draw lines (walls) to make him change direction, and you can stop him momentarily by holding him with the stylus. I don't think I would pay full price for it, but it a pre-owned one shows up I may pick it up.