If you’re looking to upgrade your own blog to WordPress 2.0 and are currently running 1.5.2, you’ll be interested to read the replies to the following post on Owen’s blog, Asymptomatic.
After having upgraded to 2.0 myself, I can honestly state that although I like the improvements, had I known then what I know now, I probably wouldn’t have bothered. Among the commenters, the consensus seems to be “if it ain’t broke, don’t fix it.” Aparently, the improvements in the latest version of WordPress are mostly internal (except for the editing screen, which broke one of my plugins, FrameBuster).
Actually, one of the issues that’s been bothering me is the habit WordPress seems to have when editing a post of deleting all the Technorati tags I assigned to it, so I have to re-assign a post its tags every time I post. Pretty annoying.
There are other goods and bads, but overall, although I like it, I would probably recommend other bloggers hold off, especially if you have a lot of plugins. If you don’t, go for the upgrade. You won’t be gaining much, but you’ll be gaining one or two things of interest.