Barclays will shortly update its Pingit cash management app to incorporate Twitter accounts, meaning you'll be able to send money to someone by sending it to their social media account alone.
Barclays says the updated app is scheduled to launch on Tuesday 10th March for iOS and Android. You don't have to have a Barclays account to use it, but both parties need the app for it to work. Adding a Twitter profile to the settings page is all it needs to get going. [Barclays via DM]