I’ve messed about with Android App Inventor since it’s very early days, when Google brought it out and made it available to the public. Then of course it moved off to MIT who’ve done a great job with it so far, and now it’s finally done away with the download and files you need to install. It’s now all in the browser at last. I’m looking forward to trying it out at last.
The only downside is that at the moment there’s no easy way to port projects from App Inventor ‘Classic’ to the new version. Still, that’s not necessarily a bad thing.