I found alot of the Protein drinks at Vitamin Shoppe - bought individual ones before committing to a case.
Isopure - liked the ready-made ones better than powder; 40g protein/serving w/no added sugar; tastes like not too sweet KoolAid, pretty expensive, but at Vitamin Shoppe they gave me the "case" price even w/assorted flavors
Lean Body - liked chocolate and vanilla ice cream; 40 g protein/serving, but 200+ calories and 9g fat; these are a nice treat
EAS - has a couple of different ones (even found some at Target); AdvantEDGE carb control 17g protein, 110cal, 3g fat; Myoplex Lite 20g protein; 170 cal, 2g fat. These were pretty good, but not as rich as the Lean Body ones
Odwalla: Super Protein Vanilla Al'mondo & Chocolate; 18 g protein, both were OK, but Vanilla a bit too sweet for me; Naked Protein juice smoothie 20 g protein; 250 calories; OK but chalky; Super Protein original - very chalky tasting! Green Tea w/protein - threw it away
Kefir - Cappuccino flavored pro-biotic drink thingie - was horrible and I threw it away!
Bolthouse Farms Perfectly Protein Mocha Cappuccino (this is my treat instead of coffee!) 10g protein, 178 cal, 2.5g fat. Tastes really good, but not much more protein than skim milk.
Also, check the protein levels on the yogurt smoothie drinks. Some are decent and low-fat.
I also have huge containers of whey Protein (vanilla and chocolate) that I was adding to smoothies (just fruit, skim milk, powder, & ice) or mixing w/a bit of coffee, skim milk, and ice. I liked the whey protein better than soy personally.
Hope this helps!