The reason why most users buy certain Android phones is because they like their feel. Vanilla Android lovers buy Nexus devices, HTC Sense fans buy HTC Sense phones, and so on. That does not mean that is the only type of Android they’ll ever get to experience, however, as there is this wonderful thing in Android development called ports. These ports give users a chance to check out a variety of UIs they would otherwise not be able to use first hand.
Samsung Galaxy Nexus owners can now play with Xperia UI goodness thanks to XDA Senior Member koaaN, who brings an Xperia Arc S port to the device. The port is very functional for only being a couple of weeks old, and there really isn’t too much wrong with it that will ruin the user experience. Currently, all the important things work such as data, SMS, phone calls, USB Storage, WiFi, and camera. The list of things that do not work is very short and includes less critical features such as NFC and video recording. So unless you really depend on your NFC chip or love to shoot videos with your phone, this ROM could be used as a daily driver. Those who need video recording and NFC simply need to be patient, as koaaN is working on these bugs as we speak.
Additional information, screen shots, download links, and more can be found in the original thread.