On Monday, Google announced that some of their applications had been upgraded on the iPhone and iPod Touch. I finally got a chance to check out the new version of Gmail this morning on my iPod Touch and it’s probably one of the best iPhone specific sites I’ve seen yet. The only thing that closely rivals it is Facebook on the iPhone.

Joe Hewitt is the man responsible for Facebook on the iPhone. Fortunately for the rest of us he released the JavaScript and CSS he used in developing the site. The package is called iUI and is available under the New BSD License. You can get a feel for just what iUI can do by checking out some examples on its Google Code site.

Creating a mobile version of a site is probably one of those projects that most of us get all excited about and then immediately place on the backburner. How much longer can we put a mobile version off? The market share of the iPhone is exploding and tools like iUI can make it easier to get a mobile site launched than ever before.