Blog oficial de Sparrow
Version 1.3 of Sparrow is completely ready for when OS X Lion lands on the market, and with it the program experiences some changes.
The sidebar gains complexity in order to access all the tags in the mail, although we will have the option to keep it simple as before. There will be a new button to send and automatically archive a message, the ability to drag and drop emails and thus gain interaction with other applications in the system… not to mention that we gain in simplicity as all the scrollbars disappear from the application.
The developers have also been working on the application’s performance, and promise that the window animations and the application’s behavior when moving through the emails will be more fluid. Sparrow 1.3 is already waiting for Apple’s approval, and will presumably be available when OS X Lion does too – thanks to Alvaro for letting us know!