Hey minkey,
I'd be really interested in the results of this. I've been considering building a newer kernel anyway to try and resolve an issue with my bt mighty mouse, if I could get that to work properly, and full screen no oversacan video output - I'd be over the moon
If you haven't already seen it, check out this link - it describes how to cross compile for PS3 from a desktop machine - much faster, if you can make it work

I'll give it a try this weekend.
[Please register to see this link. ]
Keep us posted!