MyPhotoZip
These guys are claiming a quantum leap in image compression! It looks like you can get a 30 day free trial of this product. The affiliate marketing program for MyPhotoZip is kind of goofy, see more about it at ecomecom.net.
Visitor Tim A had this to say: A demo of MyPhotoZip is available on CNET, ZDNet (possibly others). My first impression is that it’s very similar to JP2. Lossless compression performance is virtually identical on a few test images. Nothing special to talk about
Donald J. was a bit more enthusiastic: I have run several tests on this product and the quality compared to JPEG is far superior. For a raw TIFF image of 10 MB or more the file size can be compressed as much as 1000 to 1 while still maintaining decent quality if you adjust the color portion to a higher number.