This is a welcome update: today, Google announced that Google Calendar will finally autocomplete addresses when creating events.
Google Maps has long offered address autocompletion, and it's a handy addition to the Google Calendar toolbox. Events added this way will include a 'maps' link which attendees can click to see the exact location.
Google has also updated the calendar search function, allowing you to search for "lunch" (for example) and find any event with that label. There's also now the ability to invite an entire Google Group to an event.
Know where to go, stay up-to-date and more with Google Calendar [Official Gmail Blog]