Do not know how long this trick will work for obvious reasons, but here it is. As of January 21, 2009, this trick still works. This is a trick to see if you have been penalized by google (or not).  Evidently, you are able to check if Google has penalised a domain...

Numerous content marketers do not recognise the grandness of acquiring .edu backlinks while attempting to gain page rank. They presume that each backlinks is equivalent, the numerous the better. Regrettably what these people do not acknowledge will damage them. It...