http://blogs.itmedia.co.jp/honda/2005/06/5_df9a.html
Found by one @ Beyond3d:
Has a 2.4GHz Cell and an unreleased GPU with a slightly slower clock speed than RSX (overclocked G70?), connected via PCI-E (4-lane, only for test purposes).
The realtime E3 demos were running on this kit.
The software environment currently does not automatically split jobs up into threads (i wouldn't really expect that though, tbh?), but you can create your own threads, and choose from 3 different scheduling algorithms which the system will use to assign them to the SPEs automatically.