You know what? By next Christmas every country in the world apart from the UK will have an updated and much more efficient version of this, as standard military equipment, and meanwhile us Brits will still be arguing in The Sun's letters page that we should be demanding that the Armed Forces get this version (i.e. the current gen one which will by then be obsolete), while the politicians and generals will be arguing that carrying iPhones into combat is a breach of Health and Safety rules...
Still a great idea, though, but why can't the military simply put this app into proper equipment instead of an iPhone? Seems more sensible to do that, methinks...