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After adding AirPlay to AppleTV support to its Android media player app over the weekend, DoubleTwist's followup is a page out of Microsoft's Zune squirting (R.I.P.) handbook as it has implemented the ability to share MP3s between two devices. Play the video above to get more details on how DoubleTap works (or just keep an eye on Google's I/O event where it will be on display) but basically you'll need two Android phones with NFC, then tap them together and watch the file sharing magic happen automagically over WiFi or Bluetooth. The new update went live in the Android Market overnight, now all you need to do is find someone else with a Nexus S, Galaxy S II or any of the other NFC-packing Android devices expected to arrive shortly. Android Market

Add another notch to DoubleTwist's Apple ecosystem integration belt, now that its Android app has added AirPlay streaming to the list of features. As of version 1.4 it will stream music, videos or pictures to the Apple TV or other compatible devices while also claiming beta support for Sonos hardware. The DoubleTwist player is free, but using AirPlay means purchasing the $4.99 AirSync add-on that also enables wireless sync with your media library (iTunes) and streaming to DLNA or uPnP compatible devices. Twonky Mobile is a free alternative that's also AirPlay-compatible but without the tight iTunes integration; you can check them both out in the market. DoubleTwist ,  Twonky Mobile