Beginning June 1, 2012, we're ending our support for Google Sync for BlackBerry. If you already have the app installed, you'll still be Able to use it; however it will not be available for download after June 1. If you currently use Google Sync for BlackBerry, we Encourage you to switch to the BlackBerry Internet Service (BIS) or the Google Apps Connector for BlackBerry Enterprise Server going forward. These alternatives offer a better overall experience, as you can sync your email messages, calendar and contacts through a single service.
For those who still rely on the Google Sync application to sync contacts and calendar, you should update to the last time before June 1. source