With Ariaware Optimizer officially released today, this is a very exciting day for those of us involved with serious Flash RIA development! :D
I've been playing around with the tool for a while now and am really impressed with what they've been able to do. The application creates external SWFs for all classes and through using shared libraries removes the overhead of duplicate classes. Congrats Aral, Peter, Burak et al!
Be sure to check out the site for more info and download the trial!