Trolltech is the company that brought developers the Linux-based mobile application platform Qtopia, based on its Qt platform. In mid-August it also used the LinuxWorld conference to announce the Greenphone, which is thought to be the first fully reprogrammable Linux phone.
Trolltech hopes the Greenphone could help grow the mobile Linux market, by encouraging developers to create applications for Linux-powered devices.
Storing sensitive data on encrypted filesystem is very good practice. This way no one can access data of stolen computer - data is unaccessible after reboot. After booting the machine, secret passphrase must be entered before the data can be accessed.
Here are steps that I have taken to encrypt MySQL database under Debian/GNU Linux (testing/unstable).