After taking a better look at the Inside PR site, I came across their little guide to English. As I graduated with a BA in English and now spend my time checking the grammar and spelling in Espen's posts, this is something I care a great deal about. I think that every blogger (everyone, actually) should take a look at the guide.
And now I'm going to go back over my old posts, just to see how many glaring mistakes I've actually made.