http://www.1up.com/news/mass-effect-2-lair-shadow
The latest batch of Mass Effect 2 DLC will be out early September, this one
picking up the Shadow Broker plot thread left dangling during the original
campaign.
As announced back in July, Lair of the Shadowbroker teams Shepard with Liara
T'Soni as they confront the mysterious information broker. It will include
five new achievements, additional research and an intel center.
In addition, if Shepard has a relationship with Liara from the first game,
it will be possible to pick up where things left off. Out of all the DLC to
this point, it looks like this might be the one that has the greatest impact
on the sequel.
The DLC will cost 800 Microsoft Points ($10), with the release date set for
September 7.