In this age of the Internet, does anyone know of an online service that will let you keep track of the frames you have seen, i.e. similar to the databases that you buy and download, but purely online based? This would be able to be updated in almost real time, with no downloads to do, everything would just 'work' online. There could even by 'Apps' for Android/iPhone etc that allow you to 'tick off' the aircraft electronically?
If there is nothing online already, has anybody thought of creating something?