A quick update for those of you who use KDE: Chakra Archimedes has been released with a beautiful new plasma theme called Ronak - if you use some other KDE-based Linux distribution, you can download Ronak via KDE-Look.
To install it, extract the downloaded archive under ~/.kde/share/apps/desktopthemes.
In my test, under Kubuntu 11.10 using KDE 4.8, the Chakra menu branding looks broken for some reason. If this occurs for you too, you can fix it by going to the Ronak widgets folder and renaming "branding.svgz" to "branding.svgz.old" (or replace it with some other image).
Download Ronak | Arch Linux (AUR) package