Cryptography Forums: Recommended for Hobby/Puzzle Enthusiasts

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Can anyone recommend a cryptography related forum? Particularly for hobby/puzzle enthusiasts.. I'm coming up dry.
 
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Thanks. I'll hop into sci.crypt - seems to be a pretty active newsgroup! If anyone is interested, me and a few others have been trying to solve these "puzzles" for a while with limited success.. they shouldn't be too mathematically intense as they come from a book where the author has stated his background in math/cryptography is limited.

http://multimatter.com/wiki/index.php?title=Vegas_Die:_Card_Suit_Puzzles
http://multimatter.com/wiki/index.php?title=Vegas_Die:_Napkin_Puzzle

I have probably been over analyzing these, there has got to be a simple answer.
 
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