Anti-spam strategies
JavaScript replacing Mailto
Davies Memorial UU Church uses a no-spam javascript. You need to put it both in the header and replace each mailto link. The drawback is that browsers with javascript disabled will not be able to use the links.
Text email addresses
You can create text for the email address with "at" replacing "@" and have spaces on either side of the word as is done in the Mailman list archives and subscribers' lists for UUA email lists (accessible only by list subscribers). For instance, dmuuc at dmuuc.org. One would have to view it and reform it into an email address. Most spammers wouldn't be bothered.