I just discovered Photosynth, a photography software package and online gallery from Microsoft. It turns out to be a really good way to display rock art. It stitches all the photos together for you, and allows you to zoom in on details. The whole panel or gallery of rock art can potentially be linked together and it gives you a good context for seeing how the whole is laid out, while still allowing you to look at the details if you wish.
I put up several "synths", but a good example is the one from the Grand Gallery in Horseshoe Canyon.
This link will let you see all the synths I have put up so far.