For those of us with the unique pleasure of scheduling meetings with multiple attendees, Google Calendar just got a bit easier to use. Yesterday, Google added "suggested times" to Google Calendar appointments, or times when everyone you've invited to the meeting will be able to attend, based on their own calendars.
For the new suggested times feature to work, everyone you're inviting to your meeting must also use Google Calendar: it's the only way Google can peek at their schedules and let you know when you should schedule the meeting so everyone will show up. The new feature is available now for Google Calendar and Google Apps users, so it'll work just as well for organisations that use Google Apps in their offices and families looking for a way to share schedules.
Suggested Times in Google Calendar [Official Gmail Blog]