WordPress 3.0 has been out long enough that I’m feeling guardedly optimistic that all the major upgrade issues have been found. So I’m going to upgrade immediately after posting this!
With luck, you won’t notice any differences. I’ll edit this post with my impressions of the new upgrade…
… and yeah, no visible differences in the theme (as it should be) and really not that much different on the admin pages either. The upgrade was clean and fast; another good rollout by the WP team.