After seeing Scott's announcement of the 1.9 release of dasBlog, I just went ahead and updated my blog to it. The upgrade was pretty uneventful, consisting mainly of overwriting all dasBlog files with the new version.
I only did one minor change to the default Web.Config that shipped with dasBlog 1.9 and that was to remove debug compilation. I didn't need to keep any of my own customizations because the only one had been to add my feedflare macro, which Scott so graciously made into a built-in dasBlog macro :-)
After uploading the new file, I just spent a little time adjusting my existing Commonality theme to use some of the new features, like the cool Tag Cloud. I may do some further customization down the road, but for now I'm pretty happy. Way to go guys! Excellent release!