Gmail for Mobile Safari is getting a few new features. Most notably, their funky floating toolbar us now fixed. It doesn't have that little 'X' on the side that closes it anymore, either.
Google has also said that the scrolling is snappier so that the movement reflects the speed of the user's swipe gesture. This wasn't something that was very noticeable with our use, but we tend to use the iPhone's built-in email application for sending and receiving messages. More because it's very quickly available.
Still, of you are an iPhone or iPod Touch user who prefers to check your Gmail account via the device's browser, this may be great news to you.