Linux is really hotting up the mobile world right now from the ultra low cost laptop category to Mobile Internet Devices (MIDs) to mobile phones (think Google Android and the underlying tech for the iPhone).
Now Ubuntu, a community developed operating system that makes Linux useable by mortals, has entered the mobile world with the mobile edition which, surprise, surprise, looks very pretty and is "finger friendly"

Ubuntu Mobile is an Ubuntu edition that targets an exciting new class of computers called Mobile Internet Devices. Ubuntu Mobile, based on the world's most popular Linux distribution, and MID hardware from OEMs and ODMs, are redefining what can be done in mobile computing.
Ubuntu Mobile, a fully open source project, gives full Internet, with no compromise. Custom options may include licensed codecs and popular third-party applications.
- Full Web 2.0/AJAX fidelity, with custom options of Adobe Flash®, Java, and more
- Outstanding media playback so you can enjoy videos, music and photos with superior quality and easy navigation
- A suite of applications that work seamlessly to meet every need of a digital parent, student or anyone who is on-the-go
- Facebook®, MySpace®, YouTube®, Dailymotion®, 3D games, GPS, maps, in short, the full Web 2.0 experience delivered into your hands as a compact and powerful device that's easy and fun to use
The product of Canonical collaboration with Intel® and the open source community, Ubuntu Mobile is the software that makes it all possible.
More info:
http://www.ubuntu.com/products/mobile