Robin Good: Here is a great app for visual communicators, presenters and web publishers working on the Mac.
Captured is a simple screen-capturing utility which automatically uploads any screenshot you make to your preferred cloud storage service (including free one imgur.com), and instantly copies the "uploaded image" link to your clipboard.
Cloud storage services supported: Imgur, Dropbox, Amazon S3, or your own FTP server space.
As an additional useful feature, Captured keeps a full visual history of all the screenshots you have taken, facilitating the task of finding older screen grabs.
How to use it: http://www.capturedapp.com/how-to-screen-capture-mac.html
Price: $2.99 in the Mac App Store: http://itunes.apple.com/WebObjects/MZStore.woa/wa/viewSoftware?id=414675451&mt=12
Find out more: http://www.capturedapp.com/