MAtiaz himself posted about a new hope for the PSP3k , ihope it leads to something.
For now is only hello world for the Phaty.

http://forums.mformature.net/showthread.php?t=2242

Quote:Hello World for PSP firmware 5.03

The days of TIFF based exploits aren't long gone, at least not yet
Here's the third TIFF exploit for the PSP, enjoy.

Just copy the files to the memory stick root, disconnect USB and go to photo menu.
Don't dismiss the exploit even if it doesn't work on the first time, it's *very* unstable.
You might get it working on the first time, but you might as well have to try it 20 times!

The h.bin is loaded to 0x08800000, and the text address of paf.prx is passed in $a0 to the
binary code. You can then trick out function imports, like for example sceDisplayWaitVblankStart:

sceDisplayWaitVblankStart = (void*)(paf_addr+0x15F068);



This release works _only_ on fat PSPs. The slim version will come out later.

I'm not gonna include a list of credits here, I'll just forget some important names and then
I'll be screwed :P The people who need to be credited will know it anyway.

Have fun!

P.S. Just wait a few days, there's a bit of awesomeness coming up.

- MaTiAz