Waiting for Exploit 2.6
Ahh, the wonders of Homebrewing the PSP.
New Posting on the PSP Sites hint at a possible exploit using Tiff vulnerability in the PSP. The picture shows a "Hello World" running in user-mode on various flavors (updates) of the PSP kernel.
My baby is the 2.6 model anxiously waiting for the hack that gives full Kernel-Mode access. I'll post the website doing the work soon. If you can't wait, it's the most DIGGed site right now. Stay tuned.