Typically thay are not all listed in one place, most are listed on the MLS which is then propogated through all other Realtor web sites. There is no special listing format, so it can be difficult identifying the Bank owned properties. If you have a realtor, they can see in the MLS the owners names etc, if this is a Bank name, then bingo! also, some listings say, Bank owned or Short Sale ( this is not a bank owned, but the bank would need to have approval on any offers)
Best thing to do is get set up with listing alerts and pour over them, looking for Bank as Owner or Short sales etc. You can do this on my website, or let me know if you would like me to run a search for you.