This is working well for me: rapid calendar input, not too big on the menu bar, and yet nice support for multiple calendars and the like. Pretty much meets my calendar-input requirements, and leaves iCal to do the heavy lifting.

"Easily show multiple, overlapping events across calendar days and rows." Which is hard, and it is nice to know someone else has done the work.

"MagiCal is a FREE menu-based clock and calendar. It features a huge range of configuration options for how the time and date are displayed, and can operate either in conjunction with, or as a replacement for the built in system menu clock." Quite pretty, and makes a nice companion for FuzzyClock.

"a poster-sized calendar with a bubble to pop every day". Yes please!

"Click-draggable. Range-makeable. A better calendar." No IE6 support, but it's not half bad so far.

"BusySync lets you share iCal calendars on a LAN and sync iCal with Google Calendar." Well, if it does that, that's pretty nifty. Worth checking out.

Twittercal is "a free service that connects your Twitter account to your Google Calendar". Very nice!

So I've looked at a ton of stupid js datepickers, and this might actually be the best - certainly the cleanest code and the best documented. Let's see if it'll do what I want...