iOS: We were excited when the native Gmail client was announced for iOS, but the app turned out to be a bit of a buggy disappointment. It was riddled with so many issues that Google decided to pull it from the app store. Now that a few weeks have gone by and the dust has settled, Gmail is back and ready for download again.
Google has promised a better experience this time around, and plans to add many of the features suggested from its users (e.g. multiple account support and improved notifications). The app is available right now, for free, so go grab a copy. If you downloaded the original and didn't delete it, you'll need to remove it or at least log out of the app before updating for the changes to take effect.