Kernel and RTAI patches are available for some time now for linux 188.8.131.52 and RTAI 3.8. The patches are developer versions. They serve as a starting point for interested people who want to contribute to this project.
The Root File System generated with the console-base-image recipe (OE) is running now. So we have a base setup including running cross-tools, kernel and rfs.
Linux Kernel 2.6.29 compiled with OpenEmbedded build framework is running on the Beagle! It's patched with patches provided by OpenEmbedded. No other patches yet!
OpenEmbedded is used to build our cross-compile environment on BeagleBoard. This is our base system to develop an RTAI patch for ARM Cortex-A8.