And now, mobile integration with your google apps is complete. Google announced today that their ActivSync Exchange setup for the iphone, ipod touch and Windows Mobile devices will now handle gmail synchronization.
Blackberry users still have great BES integration if your domain uses Google Apps, if not you are stuck with the BIS integration with gmail which has problems off and on.
Lastly, Android users have always had good gmail integration.
Really, if you are a heavy google apps user (read Gcalendar and Gmail) your choices as to which mobile platform to use has just expanded dramatically if you need push email.
Via: Official Google Mobile Blog: Google Sync: Now with push Gmail support.