ASDoc is a command-line tool that you can use to create API language reference documentation as HTML pages from the classes in your Adobe® Flex® application. The Adobe Flex team uses the ASDoc tool to generate the Adobe Flex Language Reference. [From LiveDocs http://livedocs.adobe.com/flex/3/html/help.html?content=asdoc_1.html]
Seb (a developer on the PPV3D team) shows you how to set this up in Flex Builder http://www.sebleedelisle.com/?p=401
I could've done with this earlier this week as I ended up using the Command Prompt instead!
Also if you're @author is coming up with the wrong name Seb shows you how you can change the default: http://www.sebleedelisle.com/?p=404
I think this could come in handy when working on large projects and/or projects with multiple developers.