Other recent comments:
Being able to see code in the world: I wound up putting just enough sneaky stuff into my Ages that I decided not to publicize the code. I figure there will be some sort of wiki someday, and we can put code samples into that.
I don't plan to support multiple players co-editing a world. If you want to organize shared authorship for a world, you can coordinate having a shared player account too -- it won't be your biggest challenge. :)
However, maybe I should have a world flag that says "anybody can see the code".
Tablet use: I have only tested it on my iPad, where it works nicely. The system doesn't use any weird browser features except for websockets. A few people have reported websocket failures (on various browsers and computers). Best I can suggest right now is to go to
http://www.websocket.org/echo.html and try the demo (press the Connect button, then Send). If that doesn't work either, then you have some kind of network issue that blocks websockets.