"The port was announced in a blog entry last week. The post also
includes a link to a video that demonstrates the software booting
on an actual iPhone. The lead developer, who writes under the
pseudonym "planetbeing", says that the port has a framebuffer
driver and support for serial-over-USB, but still lacks critical
features such as touchscreen support, sound, baseband and WiFi
support, and accelerometer drivers.
"The port includes a custom bootloader that enables users to
choose whether to boot Linux or the iPhone's own operating system
at startup. The code is distributed under GNU's General Public
License (GPL) and is available from a GitHub repository.
Instructions that describe how to install it from an Ubuntu Linux
computer are also available."