Google is currently testing several new features on iGoogle with some selected users to preview them. You may see some or all of the features described below.
The new iGoogle use Left navigation: with the navigation now available on the left-hand side of the page, you can get to all your gadgets with one click. The left navigation contains a list of all your gadgets and tabs.
There’s a new Chat on iGoogle feature: now you can chat with all your friends in iGoogle without having to download any extra software. If your friends are signed into Gmail, Google Talk, or an experimental iGoogle homepage at the same time as you, you'll see their screennames listed on the left navigation.
Another change is the Canvas view gadgets: sometimes you want to focus on a single gadget on iGoogle. Now canvas views or full page views are available for some of our most popular gadgets. You can get to the canvas view of a gadget by doing the following: Click its title in the left navigation,.click the Maximize button in the gadget titlebar. Gadgets authors will take advantage of this to display more information and make their gadgets more interactive, while your feeds can be read in a Google Reader-like interface. In the future, iGoogle will support OpenSocial applications and the transformation to a social site will be complete. [More info....]
iGoogle also adds a list of updates from your contacts similar to Facebook's newsfeed: you can see stories shared by your contacts in Google Reader, recent photos uploaded to Picasa Web Albums, Google Talk status messages, shared iGoogle themes and gadgets.
Source:→ Google System