We are an educational website publisher, providing free quality information and technical tools to the world. We're kind of like Wikipedia, except our writers are flawed in that they like to get paid for their expertise. Some of our websites: http://science.jrank.org, http://careers.stateuniversity.com, http://musicianguide.com - and more
We're not targeting a specific market. Our users are everyday folks looking for factual, trustworthy information on the internet; skews toward college/high school students by default, but that's not necessarily a demo we're targeting.
The logo should connote education, knowledge, information - as well as accessibility to that information and ease of use. Library and university logos tend to be stiff and intimidating. We want something that gives a sense of intellectual quality, but also approachability.
Logo should incorporate company name and should be scaleable to small/large sizes.