Mac McIntosh, one of the leading b2b sales leads consultants in the United States, has a blog he calls "Sales Lead Insights: B2B Marketing". I've recently been introduced to his site and found it to be very interesting. There are certainly topics that could be of great use to companies and is an excellent source for tips for the b2b marketing organization on how to generate leads.
One of his more recent entries, posted at the beginning of March, is his 16 B2B advertising tips. Excellent advice for all marketing efforts.