Flexibits has released Fantastical 1.3.6 with the capability to use natural language to specify a calendar as you type the text of an event (previously, you could specify a calendar by using a forward slash at the beginning or end of your text). Now you can type “calendar [calendar name]” in an event string (such as “record Watchlist podcast calendar TidBITS”). The update also speeds up event updates for Microsoft Outlook users, ensures the details window doesn’t disappear during an active search, and autocompletes two-digit years (where 13 becomes 2013). ($19.99 new, free update from Flexibits and the Mac App Store, 11.2 MB, release notes)
Mac OS X Services in Snow Leopard
Mac OS X Services let one application supply its powers to another; for example, a Grab service helps TextEdit paste a screenshot into a document. Most users either don't know that Services exist, because they're in an obscure hierarchical menu (ApplicationName > Services), or they mostly don't use them because there are so many of them.
Snow Leopard makes it easier for the uninitiated to utilize this feature; only services appropriate to the current context appear. And in addition to the hierarchical menu, services are discoverable as custom contextual menu items - Control-click in a TextEdit document to access the Grab service, for instance.
In addition, the revamped Keyboard preference pane lets you manage services for the first time ever. You can enable and disable them, and even change their keyboard shortcuts.