Google 3D API for the browser

Have you guys checked out http://code.google.com/apis/o3d/ ? It’s a 3D graphics API made for Javascript. I’m interested but have doubts of whether JS is right for games:

[LIST=1]
[]Isn’t JS not object oriented? With games, you need tons of inheritence and polymorphism. How will JS handle this?
[
]Since it runs completely in your browser with JS, your source code will be visible to everyone. How do you feel about spending months creating a game and then having someone steal it in an instant?
[/LIST]