This article is from the perspective of a university instruction coordinator and details concerns about JSTOR and how it is limiting information to students.
From the library of The City University of New York on the importance of peer review, features of a peer-reviewed article, and how to find peer-reviewed articles.
This is an interesting interview because you get to hear from the founders of Endeca and DuckDuckGo. They explain their purpose for creating them. It also mentions a lot of things we've talked about it class including WorldCat.org and Wolfram Alpha.
Don't forget about the Internet Archive and especially the Wayback Machine in your research -- lots of good free stuff here, and you can look at what websites looked like years ago.