Maybe $.01. Everyday there is a lot of transaction going on so they can still take a huge amount from that. I know there is a few millions of people now using bitcoin. I bet they get much more than they need and there's no need be greedy.
Well for me even if it goes to around 0.5$ it would still be reasonable and a lot cheaper than other transactional fees. That's the good thing with btc and i think it's one of the things that will make btc one of the major transaction forms in the future