I actually have some of the Crystal light with caffeine (Strawberry flavored). It says Energy on the box and I didn't realize until later that that meant it had caffeine.
I used to drink a ton of Dr. Pepper. I too quit 6 months before surgery because I didn't want to wake up from surgery, want one and couldn't have one.
The first week, I had the caffiene headache...but I knew it would be over in a day so I didn't break down and drink a DP.
The first 3 weeks, every time I passed Sonic or went to the grocery store I wanted one.
BUT after that 3 week period, I have never even had the urge to take a sip. Even when we go out, I just order water. It's easier than you think. And no, you don't miss the caffiene after that first week :-)