Late Saturday, employment website Monster.com launched a professional networking app on Facebook called BeKnown .

IBM’s Smarter Planet division released a new solution recently that can make buildings energy efficient— even if they are huge and 100 years old like the company itself. Vice president of the Smarter Buildings division at IBM, Dave Bartlett, visited TechCrunch TV to talk about the stupid ways that people waste energy in medium to large buildings, and how the company’s new Intelligent Building Management solution can change that. According to an IBM press statement: “Buildings consume 42 percent of all energy worldwide; energy costs represent about 30 percent of a building’s total operating cost— up to 50 percent of energy and water are often wasted.

Disrupt runners-up , Cloudflare have been getting a lot of attention recently, thanks to the company’s role in helping LulzSec’s website stay online.

A new iPhone is approaching — this, everyone knows. While WWDC came and went without an announcement, this was expected . Instead, this year it will be all about the fall — with new hardware hitting just in time for the formal launch of iOS 5.

PayPal has hit 100 million active users. The company confirmed the milestone today. Last week, the company announced that it was upping estimates of the amount of mobile payments transactions using the technology this year; doubling the estimate to $3 billion in mobile total payments volume (TPV) in 2011.

On Friday, Facebook increased user feedback’s weight in its automated Platform enforcement system.

Social gaming company CrowdStar has hit a milestone today, passing one million downloads of its recently launched iOS game Top Girl in 10 days. Top Girl is a female-focused mobile role-playing game that allows players to create a fashionable avatar and then climb up the fashion social ladder, collecting money by doing modeling jobs, buying new outfits, and going to clubs. The app is free to play but charges users for virtual goods

Brands in our weekly look at Facebook campaigns made some excellent use of Places integrations.

Another day, another unfortunate piece of news out of Groupon’s international operations. Today it’s that SoSata, Groupon’s Indian site, got hacked.  In a letter to users, Groupon encouraged them to change user names and passwords and assured them no financial information was compromised because none is stored on the site. Compared to the flood of angry headlines about Groupon of late, this is nothing

A new Pew research survey of U.S.