Yahoo Launches Browser Version of Messenger
eBuddy and Meebo made it clear that there is significant demand for instant messaging via the browser – many users work from computers where they can’t download software and so web based instant messaging is the only way they can use the service.
Microsoft has its own web messenger and Google’s Gtalk is integrated into Gmail and other properties. Yahoo has also experimented with web chat previously, with their integration of chat into their Yahoo Mail site.
Full article: Techcrunch.com