Finding dependent projects

[Craig Setera]

Has anyone used Ivy to map in reverse to find the modules that are 
dependent on a particular module?  Does anyone have any suggestions in 
this regard?  What I'd like to be able to do is trigger a build of all 
dependent modules (in Hudson) when a module is changed to avoid things 
like IncompatibleClassChangeError's from occurring.

Any suggestions appreciated.
Thanks,
Craig