These are some great links--my info on email obfuscation was several years out of date, so I read through that article with great interest. I think I'm going to implement some of those strategies on my site, and see if I can tweak a few to work with my comments form on my blog. Oddly, I do not receive nearly as much spam as I used to via email these days. I think most email spam comes from shopping sites and newsletters, while the rest of the bots focus on comment forms.
I used to have a really great spam filter at the blog, but when PHP was updated it seems the devs had left, and now it's no longer compatible. With this I may be able to do some misdirection and confuse any bots trying to post their stupid online pharmacy links.