According to the official Google Mac Blog, Gmail and Google Calendar have been updated for the iPhone.
Today I'm happy to announce that we've updated Gmail and Calendar for the iPhone. We've completely re-architected the code so you get more consistent performance, refreshed the user interface so it's easier to perform batch actions, and most importantly, laid the foundation which will allow us to iterate quickly and provide you with performance improvements and new features in the future.
Google has also posted a brief video intro to the improved Gmail and provided additional details on the changes to Gmail on the Google Mobile Blog.
Related Forum: iPhone
