I would link to a form wich has the right emailaddress so contact would be through those forms without exposing emailaddresses.
But if you need to display emailaddresses:
Some links to help you
http://www.u.arizona.edu/~trw/spam/http://linux.oldcrank.com/tips/antibot/http://www.knechtology.com/stop-spam/email_encoder.htmlBut remember, hardly any thing will be good enough
use forms,
make pictures from the emailaddresses and use those
John