SD Realtor (or maybe it was sdrealtor) posted about looking up the trustee sales on http://www.fidelityasap.com
You have to register, but it’s free. You can search by zip code.
For liens – you need to due a little more digging. The best way I’ve figured out is probably NOT the easiest way. If you figure out who owns the property, you can look up to see if there are liens against that person.
I figure out who owns it by plugging in the address to