Check the manual minus has written.
One of the goals of this project will be to enable large file uploads. The theoretical maximum on most systems will be 2GB. One of the design goals will be to have this work with systems that need large file sizes, e.g. large raw video files to input into Media Mover workflows
The Drupal 5 branch of SWFUpload will no longer be supported. The source however is still available from CVS.