The trustee sale has already happened. That was the "sale" that you see was recorded on 8/20/2009..
You see, we call it a "sale" even when nobody buys else buys it, but the bank is left holding the bag,
The bank owner shown on the tax record is LaSalle Bank.... You can ask your real estate agent to call LaSalle's REO desk to try to find out if the bank has assigned it to an asset manager and then subsequently to a listing agent.
DeeDee gave a good suggestion. By signing up to her email notification (or to mine, plug, plug) You could enter your email in a search for that address and you would be notified when it came on the the MLS as an active listing.