Apple recently decided not to approve Google’s Voice application, citing the application altered the main functions of the iPhone.

Today, Google has released an enhanced mobile version of Voice at http://m.google.com/voice, which is powered by HTML5 that now brings new premium features to the iPhone.

Most people who use Google Voice want to use it to consolidate all their telephone numbers into one primary one. One of the best features is now the ability to set your outgoing calling number to your Google Voice number on your iPhone. It will now be easier for your friends to adopt your Google Voice number, as they’ll always see your Google Voice number. You can also send and receive free text messages from Google Voice.

By releasing the mobile version, Google has essentially by-passed Apple’s app store approval process.

The new web-based version of Google Voice also works on Palm’s WebOS, and all iPhone devices that run OS 3.0 or higher.

The latest web version proves the power of HTML5. We can expect more developers to leverage HTML5 to create advanced applications that could too circumvent the approval process for the app store.