Fantastical is probably my most used and one of the best productivity apps on the Mac App Store. It's going for half price. Just wanted to share this as it is the lowest price I have seen. The natural language input is the most refined I have used in any app that incorporates it. If you are on the fence, the developer's website has a free 15 day trial.
It is probably referring to syncing. Fantastical draws existing calendar data from iCal and inputs data to them as you add entries. Has worked flawlessly with iCloud for me. It is not necessary to have iCal open for Fantastical to work.
Fantastical is a menu bar app. There is an anchor icon in the bottom left of the window that "pins" the app above open windows. Make sure it is not highlighted or it will block your view. You can move the toolbar icon with an add on from the Flexibits site found on this page: Flexibits | Fantastical | FAQ
You're welcome. The preferences menu has some nice customization options and the help menu gives you some great examples of sentences to get you started. A couple of easter eggs: press option+v and then the spacebar to add a reminder; use a swipe gesture across the month calendar to change months. Enjoy!
I'm tempted - really tempted. But... in a month's time, will Mountain Lion make this app redundant? It's coming with Siri-style dictation, but so far as we're aware, no "real" Siri app with natural language integration. But... it can't be that far off, eh?