Seemingly anyone who's used an iPhone (and often the iPad) knows Tweetbot -- it's often the go-to Twitter app for those who prefer not to go the official route. It's to those users' delight, then, that Tapbots just posted a free alpha version of Tweetbot for Mac. As you'd anticipate, it's an attempt to bring much of the app's power user mojo to the desktop world: you can check just retweets of your content, mute overly chatty people or hashtags, and otherwise get more control than jus
