Calaboration is a simple application from the Google Code library that allows you to easily setup to link to your Google Calendars. Upon launch you are prompted to login to your Google account ( it supports Google Apps for Domains accounts ) after which you are presented with a list of the calendars associated with the account to select from.

Once selected the calendar will appear in iCal allowing not just easy review of Google calendars but also updates to be made.

Calaboration is NOT a sync app. Once it has been run you do not need to run it again. All the application does is setup iCal CalDAV to connect to your calendars.