A comment on Thomas McMahon’s blog mentioned that Blogger is letting users map their blog to their own domain. Now that we have a new and much improved version of Blogger, allowing advanced template tweaking and a lot of improved functionality, this could provide the cheapest way to publish a professional-looking business blog.
I couldn’t resist trying this with a spare .com domain (I have a few lying around in a dusty cupboard). And it worked very well. You are warned that it might take up to 48 hours for the DNS changes to percolate through. It seemed to take about that many seconds. Here’s the (test) result.