Sprouts looks interesting

Sprouts is an open-source, cross-platform project generation and configuration tool for ActionScript 2, ActionScript 3, Adobe AIR and Flex projects.

So it looks like it uses Ruby (and Gem) to set up a project like Rails and resolve dependencies a la Maven (but Ivy might be a better comparision), and provides some missing glue in the form of ant (rake?) tasks for continuous integration.

Here’s a link about the alternative using Maven.
http://www.mindtheflex.com/?p=19

A note about Sprouts and a Flex Maven plugin (see the comments):

http://flexonrails.net/?cat=43

— it sounds here that Sprouts is really geared towards a project jumpstarter.  The comment by Luke Bayes talks about finding, download, and installing the Flex SDK, Flash Debug Player, a trace log reader, asunit or flexunit, and any other project dependency libraries.  It then creates a project directory structure, and apparently has integration with CI tools, (especially) CruiseControl.rb.

Another post on Sprouts

http://joshua.almirun.com/tech/flex/sprouts-son-of-asproject