The 5 new gates, L20 - L24 opened today in Terminal 3. They are all for American Airlines and appear to be for regional type aircraft. Press release states in part, "The 41,000-square-foot L concourse gate expansion project was built in 20 months and represents a $78 million investment from American. The new gates serve large regional flights and expand American’s gate total at O’Hare to 71 from 66".
They are showing up on the official airport website,
www.flychicago.com under the Map header. Haven't found any pics yet. Hopefully you add this as you haven't released yet so might as well get it as up to date before RTM.