Here in St. Louis the PV (photo-voltaic) market is growing rapidly, thanks in large part to incentives and tax credits. Contemporary PV installations look more like this:
This is a flat - roof office building above and a typical residential installation below.
http://www.ameren.com/Solar/Pages/RebatesandFunds.aspx is the link to Ameren's rebate programs. A google search for solar in St. Louis will hook you up with some good contractors.