Google Calendar - Docs Attachments, Free/Busy Gadget, World Clock, and More

The Google Calendar labs open with:
a countdown timer that looks forward to your next event;
a world clock that looks at the current time around the globe;
a free vs. busy gadget that looks at your friends and colleagues' schedules;
a shortcut that lets you look at any day's itinerary fast;
a way to look at custom background images when you look at your time sheet;
and Google Docs attachments that make looking at shared documents and spreadsheets easier:
›› Google Calendar lets you schedule and share events with a flexible free online calendar accessed through the web, mobile devices and many a desktop application (such as Outlook and iCal).