okay, it will probably have some carbs and will probably use aspertame, but I sent an e-mail to 7-11 asking if they will start to sell Diet Slurpees in Canada like the ones they sell in the States and here is the reply I got.
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Hello Mr. Gauthier;

First of all thank you for your interest in our Slurpees!
We are definitely working on diet Slurpees - though it is a challenge.
Our plan is to launch Diet Pepsi Slurpee this summer - though it will likely be later on in the season.
There are definitely many customers who are looking forward to this product - and so are we!
Look for it in our stores this summer.

I will look into the internet issue as well - thank you for letting us know.

Laurie Smith
National Communications Manager

7-Eleven Canada, Inc