What to do with an android app/game?

view story

http://androidforums.com – Hey guys, Basically, me and some friends are designing and creating a game which we are hoping to put up on the android marketplace. I just wanted to ask if anyone had information on a few things. a) How do we do this? Do we need to contact Google, Android or another company? Or is there a simpler way of doing this? b) Should we put the game up for free and then at a later date, if it proves popular, introduce ads? (If we should do this, how do we get companies to use our game as a form of advertisements?) c) Should we put the game up for an initial price? (If we do this, and the (General)