If anyone ever has the need to pass complex objects through a url, LocalConnection, or whatever.. I wrote an ObjectSerializer that you might want to use.

http://techish.jeremymooer.com/2008/09/random-utility-class-objectserializer.html

We developed a simple light class to connect to the YouTube gdata API and source playlists and featured videos.It’s a less comprehensive, simpler script than the Adobe’s release on code.google.com but it’s based on the new YouTube gdata API that doesn’t require a developer’s key to access data but connects through a proxy file to the gdata server to access youtube videos. 

 http://labs.flexcubed.com/?p=13 

I wrote a url prioritization class, it works with Loader, URLLoader, and Sound Objects (and maybe NetStream objects one day). This will let you set a priority for requests so they execute in the right order, take a look at currently executing requests or loading requests

http://www.danielhai.com/blog/?p=60

http://www.designvox.com/~borys/JSON/JSON.as