I've heard a lot of talk about ZabaSearch. It searches publicly able government records as well as some commercial sources. A lot of people say that it violates their privacy because it's so easy to find people, so I guess it works pretty good.
My girlfriend's parents gave me their old Mac Mini (with a dead hard drive) after declaring it surplus and deciding it would make for a nice plaything. It's one of the earlier models (A1103, if that helps), back when they were using PowerPC processors.