doubleTwist for the Mac (1.0b1b to be precise, available now) adds a whole new Android Market element to the application. Much akin to the iTunes Store for apps, doubleTwist lets you browse Android apps in a beautified, desktop interface, but the "twist" is that you can't actually download and sync apps with your phone. Instead, the Android Market browser presents QR codes for scanning with your Android phone and directly downloading the apps on the handset like you do already. Sure, desktop app downloads, backup, and syncing would certainly be better, but this is a nice start at least. D-Twist (as we like to call it) is also getting audio playback on the Mac, as well as podcast search and playback, with podcast subscription and syncing coming next (it's already on Windows). Meanwhile, Windows users will have to wait until the next major version for Android Market. Not to worry, you can do the exact same sort of app browsing at apps.doubletwist.com on any plain old browser. You can even check out the Engadget app right here.
Update: We're trying to play around a bit with the app, but at the moment the search functionality is broken and most of the QR codes are handing us bad URLs for apps. Hang tight! Every once in a while we see a blip of non-brokenness, but we're guessing there are some server hiccups at the moment holding us back from Android Market enlightenment.