It doesn't work for email yet, but Google launched their BlackBerry sync application for Google Calendar. Now when you create events on either your device, or through the service itself, everything stays up-to-date.
The new sync application works with both the traditional Google Calendar service, and the one you can find in your Google Apps account for your domain -- this means it can now be used to replace Outlook + Exchange + BES for your calendaring needs. Even though the application solves a huge problem, it's still a bit slow -- by default it will only sync every two hours, which seems like decades compared with the performance you get with push technology.
If you have a BlackBerry, visit http://m.google.com/sync from your device to download and install the application.
[via Google Operating System]