Sucks but looks like you are getting advice if you know a lawyer and sheriff. I went through the same thing back in 2008; started getting junk mail about modifying my mortgage in 2007, notice of foreclosure in Aug 08, went to auction in Nov, got a 3 day eviction notice in Dec and finally left with cash-for-keys ($2000) in Jan 09.
Keep an eye out for any filings, postings, etc, we wouldn't have even known about the auction if I hadn't come home early and seen the notice posted (manager took down later before all the tenants saw it, I had taken photos so I printed them out for everyone). I also kept in touch with the person handling the property on the bank's side, helped when we got a water shutoff notice immediately after the auction (water was paid by ll). Be prepared to lose your deposit, although it's supposed to be transferred to the new owners it often just disappears from what I've read of other people's experiences, I worked it out with the old ll to use mine for that month's lease.
It's been a while since I've looked into it but Protecting Tenants at Foreclosure Act of 2009 should give you protection, unless the new owners are going to move in they have to honor your current lease or give you 90days notice to vacate.