http://www.dpreview.com/news/0507/05071802phase1_3backs.asp
Still not as detailed as the Giga Pixel Project, but a lot more convient...
Actually, I think the Giga Pixel project is cheating in the claim to be digital photography. The have taken old spy plane camera parts to make a film camera, of whicht hey then scan in the negatives. While also flawed, I'm more impressed with the project where the guy took a large format field camera and bolted a scanner to the viewing glass. It takes a minute to get a picture (no pictures of moving stuff), but it is all digital.