Google Calendar Integration

HI All, Has anyone used Google Calendar (of course via PHP) to allow clients to schedule appointments from the business's webpage? If so, would you please tell me how you made it so it would only show the client times which were available and of course not listing private client details? Thanks, -- Leonard Burton, N9URK http://www.jiffyslides.com service@jiffyslides.com leonardburton@gmail.com "The prolonged evacuation would have dramatically affected the survivability of the occupants."