Talking of hot new social apps… Two more for your digital radar are MomentCam and TwitCasting, from China and Japan respectively. Both have been profiled by Western tech blogs as possibilities for the next apps to break from east to west. MomentCam turns selfies into sepia cartoon characters, which can then be shared on Chinese social networks (with Facebook and Twitter likely to follow). PandoDaily suggests that it’s a novelty, but its rise up Western app stores indicates that it’s a rapidly-growing one. Japanese app TwitCasting is a different prospect though: a livestreaming app for broadcasting video to Twitter and/or Facebook, with a focus on teenagers. TheNextWeb reports that its publisher, Moi Corporation, claims that 50% of Japanese college students are using the app, with 4m registered users worldwide. Now it’s opening an office in Silicon Valley, with the report noting that some musicians – including Brazilian artist Ivete Sangalo – are already adopting the app.