imgur seems to strip the Exif data when you upload a picture to it using the insert-image icon at the top of the text entry boxes for questions/answers. Can we switch to a service that doesn't do that, or find a way to use imgur so the Exif data isn't lost, or (a better option that someone else comes up with)?
Its unlikely we will switch from imgur...its used network-wide on StackExchange. I believe they also have their own commercial installation of it, so they have some pretty high end dedicated service for it as well, which is hard to come by for a decent price.
If you need to demonstrate images with full exif, I recommend uploading the full copy to flickr, a smaller version here on imgur, and link the image to the flickr page. People can then view the exif on flickr, and if the flickr copy is ever removed, at least we'll have the imagur copy here.
I think it's better if people put the relevant metadata in the text of the question. That way, it becomes easily searchable (without resorting to a specialized image search). It would be pretty cool if Stack Exchange provided some nifty automatic way to do that when uploading, though.