Core77 has a short post on The Hoffman Dovetail Key, what appears to be a simple, elegant and compact system for dovetailing wood parts together.
For those not grasping it right away, this system can enable an absolutely radical change in your production system. Consider that items joined with these HD Keys require no glue, no glue-up, no cleaning up the squeeze-out, no clamps, no drying time. Finished pieces can be stacked as soon as they’re together with no worries about glue squeeze-out from one piece marring the one beneath it, obviating the need for racks.
I’ve been saying “biscuit joiner” when people ask me what my favorite tool is (they do ask, I don’t know why). I might have to change my answer now.