There are other (more advanced) Linux Phone projects
Since I'm getting that much coverage, I want to redirect some of that in the direction of the already-existing (and way more advanced, as of now) Linux phone projects.
There are multiple mobile phone projects at handhelds.org, esp. for the iPAQ H6315 and the HTC BlueAngel.
I didn't know about any of these projects so far, but I'll certainly look at their codebase and see whether any of the high-level (user interface) code could be re-used. But let me finish the low-level driver/operating system part first :)