Now, this isnt a muddiest point, but i was filling out my taxes using Turbo Tax and became fascinated by the IR system they use for Q&A. The system appears to tailor search results based on the portion of the tax form you are working on and after you select a link for an answer there is a relevance feedback element for the search result. I feel a little embarrassed by how fascinated I am by the Turbo Tax website!