In a short sale a buyer submits an offer to the seller who then sends the offer (or offers) to their lender for approval. The short sale seller still considers and accepts or rejects the offer but does not have the ability to complete the sale without their lender approving the sale because the lender is going to be accepting less money than what they are owed.
I have a page dedicated to foreclosure listings in Davis and another that shows only short sales. These pages have stats data that is updated once a month that tracks just foreclosure or short sale activity.
You may not see many foreclosures on the market right now but that does not mean that banks don't have foreclosed inventory. They often have their own internal reasons for choosing a certain time to market them.