Google Sync has pushed Gmail messages, calendar updates, and contacts to iOS since its launch in 2009, but this half-baked solution previously lacked some key functionality. Beginning today, users can finally perform mail server searches and confirm appointment requests from their iPhone, iPad, or iPod touch. This means that you'll be able to search for messages in your entire mailbox, not just for emails stored on your device -- a feature that first appeared with iPhone OS 3, but without Google Sync support. You can also respond to calendar invites from within the Calendar app. Fancy that! A third update brings support for sending messages from other addresses listed in your Gmail account, though only the first two features worked when we took Sync for a spin this afternoon. (Curiously, Google omitted a "Send Mail as" screenshot on its blog, so this last update may not actually be available yet.) This latest trio of updates is available for both gratis and Google Apps accounts, so head to the source link for set up instructions and the full feature rundown.