You may remember this thread: http://bitcointalk.org/index.php?topic=2280.0
In any case, I am continuing maintenance of this project. Plus, it's a good learning experience for me.
However, I am skeptical of the possibility of building a full pledge bitcoin node within chrome. I think a far more fruitful endeavorer is to work with bitcoin banks/wallet providers on a standardized interface so that users can sign up with any wallet service they want.
The codebase is here: https://github.com/kiba/chrome-bitcoin
Being the ever greedy person I am, I am going to ask for donation for my otherwise unpaid effort:
TODO at present:
1. Display a list of received transaction
2. Cleanup the codebase. (Damn disorganized and repeat itself too much.)