You can check and see if your home is registered. If you are in Portland, Oregon and you have bought recently an energy audit is required and your home will be on here.
Information on saving energy and evaulating your use. Also incentives on some things like new heat pumps, insulation and so forth.
Energy Star Rebate Finder
Enter Your Zip Code and see what rebates are available in you area!
Residential Renewable Energy Tax Credit - You may be able to save on your personal federal taxes if you install some form of renewable energy. For instance you may be able to save 26% of the cost of solar installation. (*This can change) Also credit for things like biomass stoves which can include pellet and wood burning stoves.
Water rights in Oregon - Pamphlet