We mentioned GMTaskSync back when it was in public beta but the developer let us know that they have made some improvements now that it is out of beta. GMTaskSync simply synchronizes your BlackBerry tasks with your Google tasks wirelessly.
Now that GMTaskSync is out of beta the application can sync your tasks to either Gmail or your Google Apps account. The sync is two ways and looks very similar to Google Sync for BlackBerry. Currently when the app runs into conflicts the server overwrites the BlackBerry but that might change in the future. I am not sure if the app also syncs the notes and due date related to the task.
Check out the app in the store for $3.99 at this link. BlueBerryNite Workshop is also planning on sending every BerryReview user who buys GMTaskSync in the coming week until March 23rd a free registration code for their twitter tool "twast".