Where can I find today's rates for a fixed rate mortgage? I'm also looking to see past days for a trend.

I’m interested mostly in 15 and 20 year fixed mortgage rates for the current day and over the past several weeks. I’m looking for a direct link to a site with this information in a quantified format, without having to fill out any personal info and, in effect, apply for a new loan. http://bit.ly/jl2RHb