Hum. I'm not sure I subscribe to the idea. While I'm sure there can be benefits of upping your protein intake, this... before-bed-protein-equals-weightloss thing... it strikes me as just another fad concept.
I pulled up a review of this concept and read this:
http://bruzzbuzz.hubpages.com/hub/Is...r-Does-it-Work
I don't know. Anything that claims to help you lose weight with no diet and exercise just strikes me as silly. If weight loss were that easy, there wouldn't BE overweight people.
I think a protein shake at bed just for the sake of having protein is extraneous calories, and unnecessary. If you've allotted calories for a bedtime snack, then have at'er in my opinion, especially if you're hungry... but I'd just make sure you were getting in a rounded diet of healthy fats, carbs and proteins during your whole day, and stick to the tried and true methods of calories in-calories out.