SURL, or Software Usability Research Lab at Wichita State University publishes their easy-to-read and well-reseached studies here. Great source for tips and principles when you’re planning site styles. I liked the info on the influence of the typeface on the perception of a resume or a company website, and the top 10 shopping cart design mistakes.
This type of work is filling in a huge gap– it’s attempting to quantify things like ethos, which the article defines as the audience’s perception of the author’s credibility and trustworthiness. (Incredibly important qualities for resumes and company websites!) Ethos has always been seen as a “soft” quality, like “people skills”; and therefore less valuable. I’m pretty stoked that the internet is not only using ethos, now, but demanding it.