The pictures are spectacular – upon entering the site, you’ll be shown a random picture of the series. The technology is interesting as well – it’s described in detail on the site. In a nutshell, the pictures are shot with a high resolution digital camera from a helicopter, and stored on an Apple powerbook, together with the exact position from a GPS receiver.
I checked out californiacoastline.org after Slashdot reported it. Amazing – this dot-com millionaire took his helicopter, and took pictures of the entire Californian Coast (okay, a few bits are still missing).