Has anybody seen a framework which is either written to work with Guice or a library that integrates an existing security system (ie: Acegi) with Guice?
I have found the
Apache Shiro 1.2 and later has native support for Guice applications:
http://shiro.apache.org/guice.html
HTH!
For whatever it's worth (being quite a late answer), I've had success integrating Apache Shiro with Guice. Last time I checked, Acegi was too deeply dependent on Spring to be usable in a pure Guice solution. Shiro's documentation is a little lacking, but the API is pretty straight-forward and easy to use, if don't mind a little digging.
In case it's of any interest, I've posted a Gist of the simplest example I could find. Two caveats:
Hopefully, it's enough to get you started...