TKE has ordered a Embedded Development HW/SW Kit – Spartan-3A DSP S3D1800A MicroBlaze Processor Edition
to start evaluating different cpu soft cores.
http://www.xilinx.com/products/devkits/DO-SD1800A-EDK-DK-UNI-G.htm
Work on a wishbone compliant MOST controller have started at opencores.org. The project is still in planing stage.
http://www.opencores.org/projects.cgi/web/most_core/overview
Bertil