Single-cell software company Rogue Amoeba has released Airfoil 4.0.2, an update to its utility for sending your Mac's audio to all sorts of devices. The new version includes a slew of bug fixes; chief among them are improved AppleScript support, better Instant On performance, better full-screen playback in Airfoil's Video Player, smoother network load performance, and fixes for several rare crashes. Also in the release are several new features, including a Deselect All Speakers menu item, support for Flash 10.2, and window state saving across sessions. ($25 new, free update, 11.1 MB)
Mac OS X Zip Expanding Utility
Firefox (and possibly other applications) may ask you what you want to do with .zip archives that you download from the Internet. If you want to expand them with Mac OS X (rather than StuffIt Expander), you may be unsure of which application actually does the job. You're looking for Archive Utility (in Leopard and later) or BOMArchiveHelper (in Tiger). In either case, the application is stored in Hard Drive/System/Library/Core Services/. Don't move it from there, though, or you'll confuse matters.