Sharing photos on Facebook is simple and useful (sometimes), but the resolution is almost always dumbed down, destroying the quality of the image in the process. But that's not the case anymore.
Previously FB users would upload photos, and the resolution would be refitted to a maximum of 720 pixels. Not that great, which is one of the reasons I mostly share anything worth sharing on Flickr.
Facebook appears to have paid more attention one of its most popular features, boosting the max resoultion to a whopping 2,048 pixels. That almost makes me want to go back and re-upload everything I had already shared on the social networking site.
This also happens to conveniently coincide with the release of The Social Network today, so perhaps Facebook is trying to appease its 500 million+ followers? Even if they're not, I'm more than happy to see this improvement.