I am considering investing in a start-up company that will develop an
"indie" computer game that will be distributed online.  How risky is
such a venture?  Are indie computer games successful?  How many come
out per year?  What is the cost of developing an indie game?  At what
price would such a game sell?  How many units can be expected to be
sold? What would be a reasonable amount to invest?  How long should
the development take?  Who would comprise the development team
(artists, programmers, etc.)?  Any other relevant advice.