The Phoenix - TH7 Farming Base
Basic idea is to use collectors and a few open defensive units to lure enemy troops through a ring of traps and crossfire. Let me know your thoughts!
Note: The initial openings into the base are not trapped, but are designed to look like they might be trapped. I expect some attackers would try to drop troops on those entrances, in the hopes of setting off traps that don't exist, thus slightly weakening their attacking force.
And of course the primary traps are all in the interior, to ensure they can't be force set-off by an attacker. The spring traps setup at the top to protect the mortars from the giant/healer combo (you can't heal a giant that's been flung off the battlefield! :)
http://i57.tinypic.com/149tkk4.jpg