As John Lange mentioned, you can check out my website for pics of a double-router system (the trick is to mount one above and one below so that you are always feeding against the rotation of the bit - otherwise you are making a risky 'climbing' cut).

As George points out, the time savings are probably very low once you take into account the time to make the jig and get it adjusted. If you are into making gadgets and like the idea then it is fun and rewarding when you are done. If you just want to get to stripping George may be right that running the strips thru a single router twice is the way to go...