Retention - if you build something people want/use AND come back and use often, then you can usually figure out a business model to make it work (if there's a big enough market).
I don't think I would add anything to Sean's pyramid but I do have my own approach to things that essentially breaks it down a bit more to a granular approach. 1. Find users who've had success If you're lucky to have 100-1000 users, I'm hoping you can identify 5-20 of them that love your produc...
Easy :) There are a number of companies that make games which would work with your steering wheel. If those companies have captured the email address of their users (or have the ability to send push notifications to the device) then they already have a direct relationship to your market. Go to ...
The viral strategy needs to be a natural extension to the app that requires SMS - not sure you want to just use it for the sake of it being viral (seems forced). A perfect example of this is the Twist app. The app tells someone you are meeting with when you will arrive. When you set up a twist ...
A whole lot more data is needed before anyone can answer this question. "Some people want it"...have you identified a target market? Are there similarities in these people? How many? Did they tell you what they'd pay for it? Why didn't they pay you for it already (before you wonder about this, p...