I've tried 3.3v and 5v just to see what would happen. I guess that's kind of a bummer if this thing only shows numbers. Makes for good practice though - I ordered an assortment of lcd displays from electronic goldmine. I hope to end up with a display that can show numbers and letters and possibly one of the negative contrast ones.
Anyway, so how can I go about figuring out the pins? Brute force is fine with me; I'm having trouble wording this next part and I figure this would apply to any unidentified display - If I just randomly touch wires to pins; How do I know which pin I'm on by whats on the screen (or is that even how I'd go about it)?