This is an Alfred 2.0 workflow (extension) which will take a screenshot and upload it to Imgur. You will need Alfred 2.0 (currently in beta). This workflow also uses the command line tool imguru to do the uploading. You can download that here.

Activate the workflow with the ‘screenshot’ keyword. Once activated, you can switch between screenshot modes with the SPACE bar. Window mode grabs a full app window, and Selection mode (on by default) lets you draw a rectangle of what to capture.

The screenshot is immediately uploaded, the Imgur URL is saved to your clipboad and also displayed as a system notification.

Download it: Screenshot To Imgur