Its origin is from kde-look, so no not only a ubuntu widget but ubuntu obviusly accepted it.. but as of other distros or so i have no knowledge.. but the source is here: http://www.kde-look.org/content/show.php/Domino?content=42804
Hmm, it looks like you might be better off asking the dev to port the theme to KDE 4. Apparently someone tried but did not get very far, it's in the comments. Naturally, KDE cannot just make it work without it being ported.
well then its a raincheck untill i can get the real kde3 repo installed(manualy fix the missing packages in the repo) so that i can update to jaunty as i now have alot of old unoffical repo kde3packages locked... but i will get back when i have a kde4 install to compare 2.
Great. You can file it at bugs.kde.org or you can contact me and I'll help revise it and file it.