Yes Sir. I am currently using Unity 3.0 Beta. Deferred Lighting and the "Beast" integration make for one awesome workflow. Can only recommend the engine. Thomas P.
As said I am currently using Unity 3.0 beta with in Deferred Lighting mode to properly light my scene. Once satisfied I'm using the "Beast" light mapper to bake all lighting and AO and I couldn't be happier with the workflow and results. Thomas P.