[dagw]

The open drivers do support 3D. You won't get the same performance as the closed drivers, but you will get accelerated 3D plenty good enough for desktop effects and simple 3d games.

[i80and]

The open drivers support 3D IF you're using R600 or below. Which is a pretty big if. Once the new Gallium3D driver is merged in Mesa 8.0, we'll talk.