Rogue Amoeba has released Airfoil 4.7.4, which now provides support for Airfoil Speakers for Android (which was recently released as a public beta). The network audio streaming app also improves support for audio sent from an Apple TV (running iOS 5.1 or later) to Airfoil Speakers and fixes a crash that occurred when selecting "Show Airfoil Only in the Menu Bar" in Preferences. ($25 new with a 15-percent discount for TidBITS members, free update, 9.1 MB, release notes)
Full Screen Quick Look in Snow Leopard
When viewing files in the Finder in Snow Leopard, instead of pressing just the Space bar to enter Quick Look, press Option-Space to display the selected document in full-screen Quick Look, expanding the preview and hiding everything else that would otherwise remain visible.