I guess the first journal that I'd recommend would be that of prester_scott. He has a fairly wide readership, so even his link-only posts (which themselves are good) tend to generate interesting discussion in comments. If you're interested in Christian theology, libertarianism, homeschooling, guns, or any of a plethora of other seemingly disjoint topics, this journal may appeal to you. Be warned that it is theology-heavy, but there is plenty else around (including the occasional movie review).

His links are interesting, his original content is thought-provoking, and the comment trees can be fairly engaging. prester_scott is at least worth a look.