At Google, it’s all about speed. That’s doubly true for mobile applications. Google made some improvements to its mobile search, making it load faster on most mobile browsers. It does this by caching the page.
Google also added an iGoogle link to its mobile homepage. It also now allows you to customize and rearrange the widgets on the mobile version of your iGoogle start page so what you see on your mobile iGoogle can be different than what you see on your desktop. (You have to set this up from a regular computer, but can basically drag and drop widgets around to your liking).
This should make iGoogle a much more viable mobile start page. And, arguably, you need a start page with shortcuts to your favorite content on your mobile browser more than you do on your desktop. It’s just faster that way.
Below is a longish Google video with a demo of the new functionality (skip to about 1:44 in, when the actual demo starts: