New from Flexibits, Fantastical 1.0.3 brings Lion compatibility to the company’s well-reviewed calendar management app. With the new release also come Lion-only trackpad gestures and several UI improvements, in addition to a number of bug fixes that affect the way the app deals with times in 24-hour format and dates expressed using non-Gregorian calendars. ($19.99 new from Flexibits or the Mac App Store, free update, 7.5 MB, release notes)
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Multi-Monitor iChat in Snow Leopard
In Snow Leopard, on a multiple-monitor system where you're using screen sharing over iChat, dragging the tiny inset preview of your own screen to another monitor shifts the remote screen to that monitor.