Saw a tweet from Jane Hart about an e-mail address HTML encoder from SiteUp Networks. The idea is to format your e-mail address so that it is NOT readable by an extractor or search engine in an effort to prevent HTML e-mail harvesters from getting your address off your web pages.
I used it (it’s free and very simple) and quickly received some strange-looking (i.e. not easily readable) HTML code that I can use to replace the normal “mailto:” type of an email link. This is the result.