Tab rules (but I've been a diabetic for almost 30 years, so I kinda grew up on the stuff :) )
When you can find it, that is. Not all Coke bottlers make it. I can't get it in Pittsburgh, but it IS available down by Baltimore and DC, so whenever I'm down there I grab some, and my friend Andrea gets it for me when she's visiting her mom in Baltimore, too...
As for the Pepsi contract, I wish it WOULD expire, Diet Coke is MUCH better than Diet Pepsi. :)