Let me just say, I think this is a fabulous idea.
I've heard of putting Irish whiskey in coffee, but not Rum. It's hard to imagine this thing being very paletteable. Then again, I suppose they're both sugary drinks. I'm going to have to experiment with this thing…like maybe every day before I go to work.
What's interesting here is what the bodily reaction to a barbiturate alcohol and caffeinated beverage. It's true that plenty of people drink Rum with carbonated stuff like Coke, but the content in caffeine is very different. You could be skipping through the office one minute and then unleashing a string of sleepy come-ons toward the secretary the next.