When raiding my guild uses Master Looter for killing trash and Personal Loot for boss encounters. This tiny add-on's sole purpose is to remind the raid leader what is selected when he pulls so there is still time to change the selection. Maybe others have a need for it as well so here it is...
To state the obvious: you'll need DBM (Deadly Boss Mods) for this add-on to work.
You can download Broker Party Loot if you simply want to watch the current setting.