Steven Shaviro

has a blog: http://www.shaviro.com/Blog/

(I was alerted by Jasper Bernes)

Lots of interesting commentary.

I think Shaviro's critical work - most notably The Cinematic Body - is required reading.

In this book he does some phenomenal Deleuzian readings of Videodrome (on which my forthcoming book Pilot "feasts"), The Fly etc.

I haven't read his most recent book on the Internet.