Seriously, how did I not know about this earlier? This was apparently included in the Dropbox update in September of 2013, however I just noticed it last week. It's pretty darn easy to share screenshots now with Dropbox. You can now set it up under the Dropbox preferences import tab to automatically save any screenshots taken to your Dropbox folder when you press the print screen button. Holding down the ctrl key while pressing print screen will copy the link to that screenshot to your clip board for sharing. You can even add the alt key in there and it'll only screen shot the active window (as usual with Windows, of course). This makes things a lot easier in regards to sharing screen shots with friends.
If you're interested in signing up for Dropbox, and taking advantage of screenshot sharing, automatic photo upload, and just a good general purpose online file storage, use this link, and we'll both get some additional storage space!