After a month of sprint, BlocklyDuino is open sourced and hosted on GitHub
Now it bounds more blocks and have some valid features:

1. Programming Arduino with visually drag and drop code blocks.
2. Generate fully compatible arduino source code.
3. Interacive Arduino board with 10+ predefined Grove sensor blocks.
4. Load different on-site examples with url parameters.

When you click the 'Arduino' tab, the mouse will auto-focused to the code area, that means you can use keyboard to select then copy the source to Arduino IDE.

And now it even support procedures (functions).

BlocklyDuino Google+ page has been created and will update more frequently then here for new features.