@starfeeder
You basically just described the path I'm taking

I just started a nodejs project to get the ticker info for a bunch of exchanges. I'm thinking of expanding this to make 1 huge node.js wrapper library to aggregate all the api's for all the exchanges (or most of them anyways).
But before that, I thought to start by making the ticker then maybe some website to send email alerts for a given exchange/price. Maybe add some charting , etc...
Actually, if we're doing similar things, would you ever want to collaborate? I'm a java dev during the day, but have been trying to get my hands dirty with Node and Scala.