It always bugs me when otherwise smart people do this in a meaningless effort to prevent automated collection of their email address:
Anything of the form : BLAH at BLAH DOT BLAH is screaming out: SCRAPE ME! I'M AN EMAIL ADDRESS!
In fact, it might as well be written in day-glo blinking letters for all the spammers perl script's regexes care. See for yourself, try a search on Google...
If you want to let humans see your address, but you don't want scrapers to see it, you probably are best off making it an image, and somewhat CAPTCHA like. But there's no guarantee.