i have developed alot of business ideas to test or market stage over the years.
first off... ignore your friends, unless they have an MBA or are head of major corporations, they dont know what a company wants.
if you are serious, build a few games for existing products,. and sent them to the marketing coordinators for the respective companies.
make yourself a facebook page and post them there. if you are thinking of making them personalized for people, make some of that.
make sure you log your hours when doing a build so you can factor exactly how much you need to get paid to make it viable
if you can show a working product to a potential client, they will be far more likely to talk to you.
i built this: G-Saler The garage sale App
it is entirely a proof of concept and functional. in this instance i wont be selling it on, but i will be using the functional existing application to
demonstrate to financial interest. you can see it demonstrates what my app will do, how to get it and even gives a portal to add a sale.
it cost a little to get it all built but long term it will be worth it.
get your idea, build it, see if it works the way you want. then, work out how to sell it next.
i was serious tho, i have lost many ideas out to people with bigger capital pools than myself, because i spoke too much or to the wrong person about
an idea. be careful who you talk to (: