Sony Mylo looks like a nice Linux device. I have to emphasize the word looks, since the device looks really nifty, at least if the point was to make bit toy-like device with a nicely embedded qwerty keyboard. Sony seems to experiment with different kind of new entertainment devices, but it's hard to say what people are really interested in using it. Mylo can't connect to other devices via Bluetooth, and its display is similar in resolution to what's on my GSM phone currently. And there are just too many half-baked music player solutions already on the market, Mylo also has small storage space and plays only proprietary audio formats.
The device is using Wind River's embedded Linux system, which apparently is somehow related to Red Hat. Interesting. I wonder what's the state of openness of the Wind River Linux and products using it, if compared to eg. MontaVista Linux (products based on which are currently mostly closed except for the parts absolutely required to be open) or Nokia's Maemo (with which Nokia actively works _with_ the community on many fronts, though which still has some strictly closed parts, too).
More and more companies are jumping on the Linux train. Now if only they would also jump the open source & community train, instead of trying to handle Linux like an old-fashioned proprietary software.