Full features list:

Revolutionary compression methods that allow to optimize SWF files to save up to 70% of their original size
Vectors & curves optimization
ZLib compression (can be applied and removed)
Shapes optimization
Morphing optimization
Fonts optimization
Zero-objects optimization
Sounds compression
Embedded video compression
Intuitive Flash movies manipulation
Easy preview and interactive comparison of the original and compressed movies
Simple and Advanced optimization settings - customize every compression option
Customizable optimization settings presets (compatible with Mac version of Flash Optimizer)
Batch compression mode
Command-line interface (available in Business and Company licenses)
Detailed logging of every event that takes place during compression

Home Page: http://www.swf-kit.com/optimizeflash.html