Why should you have a blog for your business

1. Search engine benefits
2. Marketing differentiation
3. Infinite search life
4. A cost-effective sales call
5. Your content engine
6. Direct sales
7. Indirect sales
8. PR
9. New product development
10. Crisis management

http://www.businessesgrow.com/2010/11/07/ten-reasons-to-blog-even-if-nobody-reads-it/