I use foreclosureradar.com. I have never paid for the service. Instead I use the free search function. I find that foreclosureradar gives enough free detail to identify the actual address if you cross reference the data using ziprealty (or maybe some other site) satellite view.
Go to foreclosureradar.com and search by zip. It lists the property street name and shows a fairly accurate location on the map. Look at the number of bedrooms and baths and square footage and then go look at the satellite view on ziprealty that corresponds to the area. Zoom in until you see the lot lines and addresses. Click on the individual lot numbers until you see the matching square footage, bedrooms, and baths. Bingo. Now you know the address.
I haven’t tried to figure out the best way to get the auction dates and times for free as I’m not yet interested in attending auctions. I would think you could physically go to the county recorder’s office, look up the loan originator in the public records and contact the company for more detail. But by the time you put that level of effort into it you’d probably rather just sign up for the $50 a month service.
Foreclosureradar seems to update their data frequently. I’m still debating whether I should check out the auction process. Properties have been so upside down that the opening bids at Trustee Sales weren’t worth it. I’ve heard maybe that is changing though (the opening bid amount, not the underwater part).