In addition to being fun, Blogging is a good way to bring in traffic to your business and also legitimize your business a bit -- done right, Blogging can make you an expert (although be warned, there are many ways to do them wrong). I created my blog,
J-List Side Blog, with Blogger (the best tool out there) and moved over my 7 years of old posts to the Blogger system. After a small problem with duplicated text (since my old site's info was still up), the blog comments seem to do really well, and get indexed within 3-4 days.
Did I mention it's fun?