Managing My Blogroll

And now for a post that has nothing to do with Obama. I'm gonna adjust my blogroll in the next couple days--mostly, I'm gonna add some folks (Balloon Juice, Kathy G, Amptoons, Jed Report...). FIrst, taking my que from Balloon Juice, I wonder if you guys have any reccommendations for blogs I should be reading, that I'm not. Also, what are the online ethics of pruning your blogroll? I mean, I read--and when lucky, write for--Slate, but they don't need any help from me. I'm more concerned about blogs that I don't read much anymore. Any thoughts?