I've tried it with a picture of mine. The encoding process was painfully slow, but I guess that does not concern the end-user much. The file size went from 1.

I've tried it with a picture of mine. The encoding process was painfully slow, but I guess that does not concern the end-user much. The file size went from 1.2M in jepg to 164K in bpg, and the decoding was fairly fast. After turning the image back into PNG the quality seemed OK but that's tough to assess objectively. The coolest thing is this javascript program that can decode and display the pictures on-the-fly. Definitely an image format that could save storage space and bandwith, IMHO.