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If they crack the code, which is a fairly simple substitution cipher (or not), it reveals a phone number where they can leave their contact information
http://www.techcrunch.com/2009/09/21/google-is-searching-for-beautiful-minds-but-so-far-no-m-i-t-students-have-broken-its-code/
http://www.davemark.com/?p=1376