I managed to create a PSP port using the independand PSP SDK from www.ps2dev.org. It still lacks camera positioning, multiple viewports, and text output. Unfortunately my PSP broke :( and if I have it repaired they probably up the BIOS to a version that is not compatible with the indie SDK.
An empty (meaning nothing implemented yet) PS2 shell has also been created just waiting for someone (e.g. me) to code it.