The company just emailed me back, but without a real answer to the potassium question. Well, I did find out that 8 oz of the almond milk contains 29 mg of phosphorus. Now that made my day!
The milk actually lists 0 mg potassium. Don't know if I believe it, but it should be lower than that of regular milk.
Here's the link to the product page:
http://www.pacificfoods.com/our-foods/nut-grain-beverages/organic-unsweetened-almond-vanilla-non-dairy-beverage