If you are still using Internet Explorer 6.0, Facebook has a new incentive for you to move onward and upward: Facebook Chat.

On its blog today, Facebook announced that its chat feature will no longer support IE 6. Like an increasing number of web applications, the social network cited the 9-year-old browser's inability to support new features as the reason for dumping it.

Facebook won't be flipping the IE 6 off-switch until September 15, so users will have a few weeks to evaluate alternatives or try to convince the boss to finally make the move to IE 8, Google Chrome or Firefox.

The announcements suggests that Facebook Chat will be getting a significant upgrade in the coming weeks. The exclusion of IE 6 likely means some significant HTML5 features, although we will have to wait and see.

More: http://news.yahoo.com/s/mashable/20100825/tc_mashable/facebook_chat_to_drop_ie_6_support