Photovoltaic Incentives

What incentives are there for Texas homeowners outside of Austin for photovoltaic systems?  I stumbled across this website today with some information on rebates available.  Local solar installers are popping up state wide.  It never hurts to get a quote :)

Home Photovoltaic Systems
Photovoltaic systems must provide electricity for the residence, and must meet applicable fire and electrical code requirement. The tax credit is for 30 percent of the cost of the system, up to $2,000. This credit is not limited to the $500 home improvement cap.