ThinkShop, a blog on history, politics, and literature (among other interesting and intelligent musings). This blog is very well-written by an educator who lives in Switzerland.
nthposition online magazine is hard to categorize and certainly extensive. Here are the sections, just to give an idea: Strangeness, Politics, Opinion, Places, People, Poetry, Fiction, Reviews, Artreviews, Discussion, Contributors, Links. Good writing; some eye-opening essays.
In These Times, always interesting, always pointed, always good reading:
In These Times is a newsmagazine committed to political and economic democracy and opposed to the dominance of transnational corporations and the tyranny of marketplace values over human values. In These Times is dedicated to reporting the news with the highest journalistic standards; to informing and analyzing movements for social, environmental and economic justice; and to providing an accessible forum for debate about the policies that shape our future.
Delineating Art, the blog of artist Elaine Cheung offers commentary on art and life. Many of her posts begin with a particular artist or piece and then lead out to a larger point. Thoughtful and interesting.