This great news would be another good reason why you should stick to iGoogle or to transfer to iGoogle. If you are already using iGoogle you know that you can have access to your emails (Gmail), Calender and to many more useful information in one page. That page is iGoogle.
Recently Google has introduce chat option (just like in Gmail) to iGoogle page. This is what Google says about chat feature in iGoogle page.
Currently, iGoogle chat is rolling out in English for our U.S. users. But don't worry, the feature is coming soon for other iGoogle supported languages and countries. You can check out ourHelp Center for more information on how it works, and as always, we are interested in hearing any feedback you have."