Very exciting. 4.0.0 packages are going in kubuntu-members ppa for gutsy (thanks to stdin and Riddell and others) and will be included in hardy alpha 3. Some of the bugs that were bothering me in the last snapshot have been fixed, so I am now running KDE 4.0.0 as a full session and loving it. Most importantly, konqueror-kde4 now works nicely for web browsing, including WordPress.
In related news, work has started on an all new version of Adept for KDE4. It’s in very beginning stages right now, and I’ll try to find time to help out with it. Comment here if there is some specific feature you’d like to see in the new version, but please no rants, and bugs go on Launchpad