While I'm still on the topic of blogs (don'tcha just love 'em?!), here's a great article with suggestions and ideas for using your blog to the best of your abilities when it comes to promoting and marketing your books.
Build an Audience for Your Book with a Blog by Jimmy Moore
http://www.writersweekly.com/this_weeks_article/003218_01182006.html
Good ideas...
Happy promo'ing,
Beth