seems to be a lot of advanced stuff there well over my head lol
however some links which i have found usefull in learning for actionscript and integration with xml php and mysql is the below links:

http://www.gotoandlearn.com - excellent advanced tutorial site

http://livedocs.adobe.com/flex/3/langref/migration.html - all as3 lang ref in comparison to old as2

hope thats a start anyway