Google might not have provided Galaxy Nexus users with KitKat love but developers at XDA have been hard at work in bringing a stable KitKat ROM for this Nexus smartphone. This hard work by the developers has paid off and Galaxy Nexus now has access to a pretty much stable Android 4.4 ROM.
Based on CM 11, this ROM works nicely and the only problem seems to be with the screenshot animation, however actual screenshots are just fine. Apart from that everything else is working great. Some apps are not reportedly working properly with KitKat but those might be app related issues.
Although you can wait for few more days for further refinements to this ROM but if you really want to try out KitKat on your Galaxy Nexus without messing up bad, it seems be a pretty decent ROM.
Head over to this XDA thread for ROM download and installation instructions.