Capture Online

Capture Online is an easy to use screenshot maker and uploader. It takes a screenshot of the entire screen or screen region and uploads it to web or uploads picture from the clipboard.

Don't bother sending e-mails with the attached screenshot to one or many users, you'll just waste time waiting for the reply. Contact them directly in a chat to deliver the link and get a reply right away. The program is usable even from behind a firewall since it does not use FTP protocol.