A lot of camera's know how they are being held via electronic levels built into the camera body and record this in the exif information.
It would be kinda cool if this could be used to straighten up a photo, simply and quickly after going through a lot of a colleagues photo's to straighten and crop for a website. It would be a massive time saver.
The distort-> perspective tool is pretty useful for now. (as is lightroom / acr's new transform panel).
thank you