Google Apps Connector for BlackBerry Enterprise Server now offers two-way calendar sync. This feature provides mobile device users with the benefits of Google Apps by synchronizing Google calendar with your BlackBerry. Users will have the ability to accept/decline meetings, schedule new meetings, move meeting times and add/remove meeting attendees. It is available free of charge to customers of Google Apps Premier Edition and Education Editions.

For additional information, please visit the below link: http://googleappsupdates.blogspot.com/2010/03/two-way-calendar-sync-in-google-apps.html