The good done during the Bush administration was, unfortunately, quite little, and it was far outweighed by the bad. History is usually kind looking back - anger fades, and we all tend to remember the good things more than the bad.
I suspect this aspect of human nature will still not be able to transcend the sheer magnitude of "bad" in GWB's case, and he likely will go down in history as one of the worst, if not the single worst president this country has ever known.
http://www.google.com/#hl=en&source=...6c7832dbb01be6