Google Upgrades GMail and Calendar for iPhones and Android, Readying Google Voice

Google has upgraded its mobile Web-based Calendar and GMail for the iPhone and Android. GMail now has added features that make it more like the Web-based version of GMail. Most of the upgrade is on the back end, making the system faster and perform better.

The company is trying to make the PC and mobile experiences as similar as possible. Here's a video of the new version of GMail in operation.

In addition, Google Calendar now allows users to respond to meeting requests, something that wasn't previously possible. 

Separately, Google is bringing Google Voice (formerly "GrandCentral") to the iPhone and the iPod Touch

GV Mobile

These moves reflect the degree to which Google views the mobile experience -- as well as the linkages between PC and mobile ("the cloud") -- as critical to its success going forward.