The initial code push has taken place for the Lima Project, which is the open-source ARM Mali graphics driver that's under development. The Lima stack development is sponsored by Codethink and its lead developer is veteran X.Org developer Luc Verhaegen. Phoronix was the first to break the news on the project last month.
The initial code is available from the Gitorious repository. This isn't a DRM or Gallium3D driver, but rather right now is basically a demo application to show that it knows how to draw a few basic shapes from user-space while banging on ARM's open-source Mali Linux kernel driver. Limare was shown on Phoronix earlier this month. It's not expected that there will be an actual/working user-space open-source 3D driver within the next six months unless ARM steps up to the plate.