A New York man who rented his apartment through Airbnb was found to have violated the city’s residency laws, marking the first legal setback for the peer-to-peer home rental start-up as it faces a growing number of regulatory questions.

An administrative law judge ruled that Nigel Warren had broken a 2010 New York City law when he accepted about $600 from a Russian tourist to stay in his apartment for a few days while he was out of town. The law prohibits apartment owners from renting property for less than 30 days, and was intended to crack down on landlords who bought affordable housing units and then converted them to hotels to make more money. Mr Warren was fined $2,400. Read more

African-American teenagers are more likely to use Twitter than their white counterparts, according to a study out today from the Pew Research Center.

Researchers noted a significant jump in Twitter use among teens in general, but found that 39 per cent of African-American teens used the microblogging site compared to 23 per cent of white teens. Read more

Wall Street is anticipating another positive earnings report from Facebook after markets close on Wednesday and the social network states first quarter results.

Analysts expect to see a bump in revenues from advertising products launched last year, and hope to hear plans for future ad products, in particular, video advertising and ad plans for Facebook Home, the new super app Facebook launched for Android phones in April.

Though business in the first quarter tends to slow compared to the preceding quarter, which included the holidays and the US presidential election, analysts are expecting 36 per cent revenue growth year on year. Consensus estimates are for 13 cents in earnings per share on $1.44bn in revenue. Morgan Stanley predicts mobile advertising revenues will be $314m for the quarter, representing 25 per cent of overall advertising revenues, up from 23 per cent in the last quarter. Read more

Andreessen Horowitz is helping to put Silicon Prairie on the map of wanna-be tech hubs with its latest investment in the Des Moines, Iowa-based start-up, Dwolla.

The young internet payment network attracted $16.5m in a Series C round, led by Andreessen, with previous investors Village Ventures, Thrive Capital, and Union Square Ventures joining.

While setting up shop in the mid-western United States leaves the company far away from the investors and talent pools on the West and East Coasts, there are benefits to building a business in a less saturated market. Read more

Microsoft has closed a patent licensing deal with ZTE, one of the top five manufacturers of Android smartphones.

The deal is Microsoft’s first with a leading Chinese company, marking an important milestone in the software giant’s multi-year campaign to squeeze licensing revenues out of smartphone vendors and manufacturers.

“Experience has taught us that respect for intellectual property rights is a two-way street,” said Horacio Gutierrez, general counsel for Microsoft, “and we have always been prepared to respect the rights of others just as we seek respect for our rights.” Read more

Foursquare’s future is veering toward e-commerce, as the company’s social media roots have failed to yield revenues strong enough to excite investors.

What began as a virtual social competition for clocking the most “check-ins” at local restaurants and coffee shops is evolving into a play for a cut of local retail business.

“Twenty per cent of Foursquare check-ins are happening at retail locations, like clothing stores and shoe stores,” said Dennis Crowley, Foursquare’s chief executive and co-founder. Read more

If I didn’t already obsessively look at my phone in search of distraction, while waiting for the train or a friend who’s running late, Facebook has just made it ten times easier to get a quick fix.

With the new Facebook “Home” for Android, photos and status updates from my Facebook newsfeed will be the first thing I see when I pick up my phone. (I’ll have to explain the demotion to my cat, Lucas, whose yellow eyes will no longer stare up at me from the screen on first swipe).

Instead, a rolling stream of photos passes over the screen as they are being uploaded and posted by friends. If I want a closer look, I just tap once. One more tap and I can see who Liked or commented on the photo, or type a comment myself. Read more

Apple has bought WifiSlam, an indoor mobile location service, as the Silicon Valley giant continues to compete with Google in mapping capabilities.

The deal closed recently for $20m, according to a report by the Wall Street Journal, citing an unnamed source.

WifiSlam’s technology uses ambient wireless signals that are already present in buildings to pinpoint the location of smartphones, as opposed to the space-based satellite signals relied upon for larger-scale GPS mapping and navigation systems. Read more

Publishers may take a cue from the software industry as they regroup from a decisive loss in the US Supreme Court over copyright rules.

After failing to persuade the justices to protect their foreign-made titles from resale in the US in the Kirtsaeng v Wiley case, publishers must instead rethink their international business practices.

While traditional publishers of books, music, and film have generally viewed the computer industry as a foe in various policy battles, it could find a saviour in borrowing its concept of software licensing agreements and applying them to physical goods. Read more

The hashtag has already found its way into real-life conversations. Similar to airquotes, some people – mostly young – form the square number symbol (#) popularised on Twitter with their index and middle fingers as they talk, to make a humorous or sarcastic point, or reference a cultural meme.

Now Facebook may want to claim the hashtag for itself. Read more