That sound yummy! I haven't tried condensed milk in my iced coffee concoctions yet - I will definitely give it a try!
Starbucks has regular ole' ice coffee in a pitcher for anyone who asks. When you order an iced coffee, they will pour it over ice and add their "Classic" syrup. Add cream and you're good to go!
Years ago, my wife and I decided to start making it at home - mostly because it's so expensive to buy one glass at a time. A $2.00 iced coffee drink at Starbucks can be made at home for pennies. Every morning we brew a large pot of hot coffee to start the day out. I have a cup or two (hot) and then the rest goes into a glass pitcher and is stored into the fridge (year round). We usually add two or three mornings worth of coffee to the same pitcher. Starbucks will sell you a bottle of their classic syrup if you ask. You can substitute a bottle of their sugar free vanilla syrup for the classic if you want to ditch the calories.
When you are ready for a cup, simply pour a cup of iced coffee into a glass of ice and add classic syrup and cream. Presto! Coffee (iced or hot) doesn't have a long shelf life so don't keep it around in your fridge more than three or so days. You can drink it after three days but it breaks down chemically and begins to taste different (old).
This recipe looks intriguing too - check it out.