I just wanted to give thanks to my man, David Ries, over at Edit.com for helping me set up Google AdWords. I have never worked with AdWords before and I had to set up conversion tracking information internal to a client site. I wasn't seeing anything useful in the documentation and contacted Dave, who works with Google a lot at Edit.com. He pointed out the fact that if you append this:
... to the destination Urls, it will get Google to automatically fill out the values in the curley brackets. So simple, yet so undocumented. Thanks dude!