+1 for Engine Management. You may see some power without EM but it's not safe. At least I believe the 07's also have the CL/OL transition delay issue.
The current preferred EM solution is the Cobb AP. They have recently released the Version 2 so you can usually pick up a used Version 1 for cheap ($350-$400 shipped usually). More info:
http://www.cobbtuning.com/info/?id=2539&rsku=0
I always suggest a custom tune. My tuner is Ed of
EQTuning. He does excellent work.
Or if you feel capable of tuning yourself, look into the open source solutions that have emerged. There are even "off the shelf" maps (AKA: basemaps) for most common setups. All you need is the cable that Knucklesplitter offered. Dean has a thread around here somewhere with all the links.