You might not think of Instagram as a place to buy and sell stuff online, but a new service called Hashbag wants Instagram to become the next Craigslist.
Anybody with a full-time job is bound to have an off-day. That doesn't mean you should vent online about how much #worksucks, though. You might get #fired.
The two heavyweights of social media are indisputably Facebook and Twitter - and the former is starting to look more and more like its real-time competitor.