A post from about a month ago on joestump.net is incredibly critical of cross-posting. Mr. Stump disagrees that Twitter can be used for anything except 140-character posts that let him know what the user is doing. I disagree with this viewpoint, mainly after looking at my blog statistics for the first 14 hours of the launch of the site:

As you can see, the first is from my old blog (which isn’t cross posting – that’s just about 40-odd subscribers checking out the new site). My blog feeds to Facebook and to Twitter, and you can see that the second and third referrers were exactly those two.