I went to the AT&T store with my dad and this guy that worked there was explaining how he hacked his Tilt like crazy and how he messed with the flash... he told me to go to tiltsite.com to find out how. I went there and I cannot find the article he showed me... It had an image with a bunch of Tilt screen shots in one image (like a collage). They appeared to all be using a theme similar to this one. It also had the iPhone's "slide to unlock" feature.
Now, don't think I know nothing about flashing and adding in add-ons.. I am very into PSP hacking, I have messed with my Flash0 on many occasions when re-installing things that were deleted with kernels.