Uncommonly useful FAQ from Google for their Google Apps Connector for Blackberry Enterprise Server, all the facts without the verbosity.

https://docs.google.com/a/bunchofcowboys.com/document/pub?id=1IT5CGxPJAqFT7I7MlJMAtnn7YloauMBSd953cu48hrk&pli=1

The FAQ is definitely the first port of call, but then try the Google Support Forums for the Google Apps Blackberry Connector here.

http://www.google.com/support/forum/p/Google+Apps/label?lid=6da1d94387deda10&hl=en