Going to compile a few Schematics, and maybe get around to Alpha Testing (AKA: "Smoke Test") soon!
Hope you do not mind sharing the idea?...
Go right ahead.
I don't know what you have in mind, but I was thinking along the lines of a simple 555 timer circuit operating either a relay or a triac to cycle the load on and off. If we don't mind the timer circuit not being isolated from the line, it could be powered directly from the supply via a bridge rectifier, series dropper, zener regulator, etc. to save the cost and weight of a transformer (although it would only need to be small and I expect you already have a few suitable types laying around in your junk box anyway).
[This message has been edited by pauluk (edited 10-04-2006).]