For scale, here are the German feed-in tariffs for 2004:
Except for the 5 c/kWh bonus for building-integrated non-rooftop (e.g.: windows, walls) units, for new units these tariffs are reduced every year by 5%, thus for example this year:
In my town, you can connect a residential PV system to the grid, but you don't get any credit for a negative meter reading (if you generate more electricity than you use). The only "incentive" is that they allow you to connect the PV system to the regular residential system so you don't need to have a duplicate or complicated in-house network.
Are you allowed to sell residential PV energy back to the grid?
BTW, while I was speaking about Germany, my own country (Hungary) has a rather crappy version of feed-in tariffs (tailor-made for the large electricity companies, consequently with almost no usage). However, the German system is now copied in many European countries in some form. *Lunatic*, n. One whose delusions are out of fashion.
