I'd be very interested in helping on this. Was actually just recently thinking of creating some escrow type service for the upcoming Coinbase hackathon (maybe a recreate of ClearCoin or similar).
I'm currently working on a few projects, but can dedicate some time/effort if you let me know some specifics.
shameless plug - follow me on github if you want to see what i have currently.
https://github.com/jxm262 I'm working on bitfinex-node and then will move on to the other exchanges, then will aggregate all the exchanges api's into 1 common node module - xchange.js
https://github.com/jxm262/xchange.jshttps://github.com/jxm262/bitfinex-nodeRegards
-J