No specific info about version 3.0. Please visit the main page of Express Zip File Compression on Mac Informer.
YouSendIt Express is a desktop client for the YouSendIt service.
Automate file delivery with hot folder processing.
Zip Mac Files for PC allows users to create PC-friendly zip files.
The Zipper is the smallest compression application for OS X.
Extracting the files from an ePub is easy - you can just unzip the file