You're kidding yourself if you think obfuscation is saving you from any spam at this point, and it's just making it harder for legitimate people to contact you. Use a real spam filter and you won't have to bother with fake addresses and obfuscation.

I've been using the same e-mail address since 1999, posting to public mailing lists, signing up for new websites, showing it as a real mailto: link everywhere on my website, and I only get 1 or 2 pieces of spam per day that make it past my spam filter (Postini).