Google has had sync available for quite some time, but up until recently it has only allowed for contacts and calendars to be synchronized between your phone and Google.The feature has been a great and allowed users to easily back their data up to the “cloud” where it will forever reside. Recently this feature got even better with the addition of the ability to sync mail and the addition of push. Now your phone can maintain a connection with Google allowing new emails, contact updates, and calendar updates to be automatically pushed to your phone. So far the service has been great (flaky at times though). The only down side- watching your cellphone battery die much faster.