Progress is much underway now. as some seen in that calculator program for DS, and the internet browser hidden in wipeout on PSP much bigger break throughs have now been made.
PSP >
- PSP UMD format cracked; game ISOs appear
http://www.engadget.com/entry/1234000713042341/
- ontop of that, they've gotten the first home made code to boot up and run on PSP.

emulators are going to appear sooner then expected. some saying within the next couple months.
This also greatly helps out the work on Linux for PSP.
DS>
- Linux kernel booted on Nintendo DS
http://www.engadget.com/entry/1234000883042510/
Quote:
A breakthrough in the DS Linux project: developers have gotten the kernel booted on the Nintendo DS as well as a simple sash shell and some text games; input to the shell is done with the D-pad. The code is booted via modified firmware that should work with the PassMe, FlashMe and WifiMe boot methods, although not with the wireless multiboot method.
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Linux with the touch screen would be cool. wonder what they'd do with the other screen, hmm.