Gone mostly unnoticed, Google has updated their Gmail and Google Calendar interface on iPhone and Android mobile devices. Google did announce a new mobile news look for these devices, but no word on the Gmail interface.
I spotted this update via the Google Mobile Help forums, where Googler, Ethan, confirmed the update. He said:
Gmail updated its look & feel in the browser on Android and iPhone devices today. Some of Google's other mobile apps, like Calendar, have also gotten the new look. Other than the 're-skinning,' features are unchanged for now.
Here is what the new 'skin' looks like on the iPhone:
Here is the old one:
Small difference, but someone noticed.
Forum discussion at Google Mobile Help.