UIQ is a platform that is solely related to Sony Ericsson. But Motorola has now also taken a stake in UIQ, the reason being that Motorola hopes to influence the design UIQ such that it can be compatible with Linux. Seems unlikely.
Good tutorials on UIQ development can be found in Simon Judge’s blog and his published tutorials in Sony Ericsson Developer World.
- Tutorial 1 - Ecosystem of UIQ
- Tutorial 2 - Setting up the environmnet
- … (many others from the above links)