CNLohr shows us the 1st demo.
This is an example of some code running on Linux, under the hypervisor talking to the Nvidia RSX (video card) on the PlayStation 3. This is done entirely without proprietary drivers.here is mc's demo from ps2 dev.
Shown is 3 animated quads, drawn in immediate mode as well as a series of triangles in the background drawn using an index buffer. This demo is a modified version of IronPeter's libps3rsx from ps3dev.org as of November 13th. It's running using a patched 2.6.24 experimental, unofficial kernel on Gentoo Linux.
Until recently, not enough was known about how to use the RSX to make any headway to usable, free access to the 3D contexts on the GPU on the PS3. With some excellent work from people in both the Nouveau and PS2Dev groups, homebrew developers may soon be able to write their own 3D applications.
[Source: Sony PS3 Modding - Homebrew, Upgrades, Mods, and Hacks]