Word Games
Mr. Panagrossi is playing word games here. Yes, in one sense "Linux" is the name of the kernel, but it's also a commonly used shorthand for a fairly standard operating system based on that kernel, plus community components including GTK+, Gstreamer, BlueZ, etc., etc.
For a Symbian representative--and remember, there are multiple different and incompatible UI implementations which sit on top of Symbian, Series 40, Series 60, UIQ, etc.--to claim that Linux is fragmented is fairly amusing.
The LiMo Foundation has published its first set of core APIs back around the beginning of the year. Those will operate the same way on all LiMo based phones, and the degree of "fragmentation" around those core APIs is nonexistent. Those core APIs will continue to be extended as LiMo's work moves forward. As Morgan says, it's LiMo's goal to produce a consistent operating system for cell phones.
(As far as the OpenMoko phone goes, X11 isn't the problem. In our experience with the device, the graphics performance of the hardware--even on the newer model, the "Freerunner"--has been extremely disappointing. X runs just fine on ARM-based devices.)