Anyone using CAPTCHAs on their forms? Well stop it! Stop it, I say! A few months back I discovered that our plasma dictionary entries were being spammed. Fortunately all submissions to that "extremely technical and scientific" dictionary are screened. But it did mean our screener was being spammed. He thought the dictionary was suddenly popular. Nope. So, I began looking for a way to pre-screen for spam. I looked for information on CAPTCHAs, but then I found some discussions on the Lasso list to do just what I was looking for without CAPTCHAs.
Today, someone on our list posted this link that has 7 different methods for protecting against spambots. These methods still protect accessibility and don't degrade the user experience. http://webaim.org/blog/2007/03/07/spam_free_accessible_forms/