Well there is the new 'Vyclone' app. It's not really an editing app in the traditional sense. I haven't used it yet but it seems to be a crowd sourced video mashup editing mechanism done by the online Vyclone website. Videos taken by others (including iOS and Android app users) at a common event are edited together online to remix into a custom video which then can be shared. Not sure or not if thereis additional basic editing that you can do directly from the app.