Dana Gardner posts a very insightful commentary on future of lead generation and the market forces behind the acquisition of Jigsaw by Salesforce. The future belongs to players who can serve as matchmakers to potential buyers and sellers.
http://blogs.zdnet.com/Gardner/?p=3572. Highlights are reprinted here:
"These [search and real-time] players are poised to grease the skids leading to a lead generation economy, one that makes conventional and current online advertising no more relevant than rabbit ear antennas for the top of your black and white television."