I don't generally go in for the typical "here's a link" (or even "here's a link to a link") type of blog post, but I'm always up for an exception.
The High Hat is an interesting music/film/books/rants webzine and has just released its second issue. For jazz, there's Sadism and Perversity At Work, a review of the Miles Davis "Blackhawk" box. Its author, Phil Freeman, blogs at Most Weird, Some Normal.