I'm not overly enamored by Apple Mail, so I'd happily make the switch to an app that's got a better overall user experience (UX). Sparrow does have a cool interface and I can wait a bit for it to support MobileMe, but I simply can't switch to any e-mail app that can't filter incoming mail based on Address Book Groups. I can't switch to Postbox for the same reason.
Why is it that none of the hot mail apps out there do this? BTW, what's up with MailTags? Is it no longer being developed? It hasn't updated in quite a while, and there's no sign of version 3.0 that was supposed to be out several months ago.Amplify’d from techcrunch.com
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Back in October of last year, we wrote about Sparrow, a beautiful new mail client for the Mac. But whereas most mail clients are now web-based, Sparrow decided it was time to focus on making a great native email experience once again. And today that gamble appears to be paying off. Sparrow 1.0 has just launched in the Mac App Store and it has immediately shot to the number one paid app in many countries around the world, including the U.S.

Back in October of last year, we wrote about