I recently saw something about big concerts even providing disposable cardboard device thingies so women can join in on the fun at the open air urinals.
I think they're brilliant. Given the choice, I'd choose to use a tree over the funk-oven that is the standard porta-potty, so this is probably the next best thing. If they can get more of these in there and shorten the lines to get me back to drinking beer, then I think someone should win an award.