A Search Engine Watch Forums thread asks how much does it cost to learn SEO.
As you can imagine, I am sure the answers run from nothing to thousands of dollars. I think I personally learned from testing and reading a book that cost $15.
But most SEOs have annual education on some level. Either they go to conferences, do webinars, pay for access to exclusive forums or just spend their own time testing things out.
For the sake of the poll below, please assume any time you spend is not worth anything. Instead, what is the true annual cost in terms of dollars you spend out of your pocket or your company's pocket, on SEO education. This can be in the form of going to conferences, having SEO training, buying books and so on.
Forum discussion at Search Engine Watch Forums.