I did the EXACT same thing you did Bruiser when I bought my 2011 a couple weeks ago. I even remember saying to the dealer when I was looking at another car "the main things I want are gas mileage, AC and Cruise". Then I drive away without cruise...
I heard other people talking about Toyota vehicles having the harness and just need the stalk or rigging some buttons to the connector. I don't know if this is the same for Honda, but there is an after-market cruise control made by Rostra that they claim will work.
anyway.. there is another post about cruise here:
Rostra Cruise Control Kit
I hope that helps.. if anyone finds that it is just a matter of finding the connector/pinout thats great as well, but I'm not holding my breath on it as I have dug around online a lot and not found anything. Also, on 2011 I think the normal location for the buttons is on the steering wheel.