If you want to prevent robots from harvesting your email address, you can use this tool to generate an image with your email address. I have used it on a couple sites and noticed a considerable drop in spam. I am hoping over time this trend will continue. I can't believe the crap people will send you. How many Viagra pills or "money-making schemes/scams" does one person need? I really feel bad for all those suckers that get taken on these types of scams.
At any rate, you can use this image for your blog, website or signature.