Checking e-mail on the iPad & iPhone is great — there’s nothing better than tapping a bunch of spam and deleting it in seconds. But there is still room for improvement. Why is why it’s good to hear that Google’s updated the Gmail for iPad interface (for a second time) to include some nice touch-specific features. Now, conversations have a “stacked card” appearance, which lets you flick through them quickly to view past replies below your current one and leave an uncluttered interface. You can check it (for free, obviously) right now.