updated 02:10 pm EST, Mon February 9, 2009
Google Sync for iPhone
Google this afternoon revamped Google Sync to include beta two-way support for iPhone, iPod touch and Windows Mobile devices. These and any SyncML devices can make updates to calendars and contacts that get sent to Google's cloud with changes elsewhere sent back to the devices. The feature works through a new license Google has obtained that uses Microsoft's Exchange to push the information in near real-time.
In test form, the service currently lacks e-mail and is limited in the number of calendars and contact information it can sync. Google also recommends backing up local data from the phone before switching on the feature, which (on iPhones) involves both enabling Google Contacts sync within iTunes and setting up an Exchange account on the iPhone itself.
Outside of SyncML devices, using the full Google Sync requires iPhone or iPod touch 2.2 firmware for Apple's hardware or else Windows Mobile 5 and 6.