Here are 2 great Property Management companies. Both I have worked with in the past and they are great people:
Johnathan Teeter of Task Property Management at (707) 579-2013 and then Alliance Property Managers (707) 524-8380.
Hope this helps.
http://www.trulia.com (Rentals Section)
http://www.zillow.com (Rentals Section)
http://www.realtor.com (Rentals Section)
Between all of those, you will get a very clear picture if you can find what you are looking for. Good luck!