Spent an hour or so checking out youtube multiboxing videos to snag some ideas on reconfiguring my UI using videofx/clickbars and I ran across a video Mosg2 uploaded. While it is a larger scale operation than I'm considering or what this discussion has circled around, the UI configuration is one of the better ones for PvE. Pretty compact UI, great use of broadcasting, and a clear explanation of what's going on.

http://www.youtube.com/watch?v=peBPbR-sPck