The new Cafepress tools are nearly ready to go. Again, they are called cpExtract and cpFile. cpExtract will pull your product information from Cafepress. cpFile will generate a file for use with Google Base, Yahoo, or any format you want. I wanted to do some more bug testing, but given the problems that have popped up lately, I'm going to release them now. Feel free to use them, but expect some bugs, just report them in the cpExtract/cpFile Support Forum.
cafeToolbox
http://www.cafetoolbox.com/article.php/2008050117343485