Screen protectors (personal experience)
Following up on this post, I purchased the Pocket Solutions HD Screen Protectors. They are not the crystal clear kind, but, rather the anti-glare kind.
The first set I received was not cut properly. After my second support request (the first received no response), Pocket Solutions sent me a replacement set at no cost. These fit better, but there is about a 1/32″ gap on one side. I’m not sure anything can be done about that, though, since the screen on the i760 is recessed.
It has worked well so far – no smudges, fairly readable outdoors, and no scratches.

Did your screen protector come with a grid? for easy cutting. I recently bought a mirror screen protector which did and made application incredibly easy.
Nope, no grid, but my problem wasn’t that it was too big, it was that they were too small. That said, it’s worked out very well so far.