Murrina Humanity is an attempt to create a consistent and functional dark theme with an Ubuntuish colour scheme. It is darker, subtler and more heavily saturated than Dark Room.
I've been working on and using this theme for about three months now, during which period it's gone through two complete re-writes and numerous bug fixes and cosmetic alterations. That said, I'm sure I've missed many things. Bug reports and bug fixes are welcome, as are aesthetic suggestions.
Dark GTK+ themes have a number of inherent problems in Firefox and, especially, OpenOffice. I do not think there is a solution at present, short of making sure (which I have) that most everything can be read even if it's dark on dark or light on light.
Saturation is hard to get right for different screens and their users. If you toy around with alternative values, I'd like to hear what you come up with. It's easy to do so using GNOME Apperance Preferences or editing the values in the gtkrc on line 10.
There are still things to be done. Consider this a beta release.
Colour scheme based on the following palette: http://kuler.adobe.com/#themeID/85552
GTK+ based on and inspired by: DarkRoom 0.28.6 by Kenneth Wimer & Conn O'Griofa, Shiki-Colors 2.1 by perfectska04, and LUX 0.9x by SzerencseFia.