Go to http://www.speech.cs.cmu.edu/cgi-bin/cmudict and you will find the download page for the pronunciation dictionary at https://cmusphinx.svn.sourceforge.net/svnroot/cmusphinx/trunk/cmudict/
The latest version is currently cmudict.0.7a.
This is what I am currently using to implement the syllable counter for http://www.haikuvillage.com. It's in Ruby and I'd be happy to open source it for you if that helps.
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