AS3: MetaData
I've been curious about the usefulness of MetaData in non-flex projects, as documented in these sites, it can be used for persistance, and introspection, as the metadata shows up in the describeType XML. It does involve more steps so I'm not sure how appropriate this is to a normal workflow.
http://blog.gtuhl.com/2007/03/05/flex2-custom-metadata/trackback/
http://orangeflash.eu/wp-trackback.php?p=45