We hiked Half Dome from Happy Isles and Clouds Rest from Tenaya Lake last week. Pictures are here. The granite between the cables is really slick. I wouldn't do it again unless I had a climbing harness and clipped into the cables.
Very nice pix, RichardK!
Recently watched a show on the HUGE electrical storms they get there and of the doomed party in ~79 that got hit on Half-Dome.
Wild stuff. Still haven't been there yet!