Here's a two-fer. The first one I found in a Maemo entry of all things, which linked to a video showing just how bad the OpenMoko UI is on basic usability tasks. You have to see this video to believe it. The video was posted in response to the Free Software Foundation's bullshit posting "5 reasons to avoid iPhone 3G". I won't even comment on how the FSF's title is a wonderfully entertaining grammatical train wreck in its own right, and only helps to contribute to the uniquely lame posture of the FSF. And, of course, the FSF screed linked to the FreeRunner. You know, if you're going to call out somebody like Apple and then have the stones to offer an alternative, you better make damn sure it's at least the equal to the iPhone, or else the world is going to point and laugh at your painfully lame alternative.
The second example of an OpenSource train wreck comes courtesy of the fine folks at Linux Hater's. In this example Epileptic Gaming installed Yellow Dog onto a Playstation 3 to answer the question of "whether or not it makes sense to install Linux on your Playstation 3." Short answer: hell no. But I'll let you play the video and enjoy the fun.
This isn't FUD, folks, This is plain old fashion ugly truth. Whether it's on the desktop or on some device, Linux has serious shortcomings that other operating systems have already solved and solved well. As long as more time and effort are put into the ideology of open source, especially the GNU side of it than the technology, then the technology will suffer and fall further and further behind.