This is an awesome Idea. Always looking for something like this. Cab rentals are too high.
You can talk to Cab Service Providers in different cities. And don't worry about monetizing. Once you have a good userbase, you can charge a minor amount from Cab Service Provider or even users when they book a Cab (and its actually saved them some bucks). No one will mind giving 1 buck each time they book if it is saving them 10.
I am learning a lot at this company. Main focus for me right now is to learn a lot. I am at early stage of my career and working on something exciting and new everyday is more fun than a fat paycheck. (EDIT: Question - Am I getting too emotional with this stuff, and is money more Important?)
I am good at stuff, and feel that I will jump to a higher paying job whenever required in the future. For now I want to stick to what I love to do. :D
I don't know about Google or Facebook, but here is my story.
I turned down an offer from a big investment bank (after working there for few months) and now joined a company which I can say is just average. For me I wan't to keep a work/life balance. Wanted to give time to myself as well few side projects. Staying in former would've required too much commitment.
But here's the lesson I learned, no matter what company it is they will ask for same amount of time commitment. Only difference lies in the type of work they assign to you. So it is good to be in an awesome company so atleast you can work on some challenging assignments.
