The port of Cube created by Intel for their latest mobile cpu & 3d chipset has been uploaded to sourceforge. You can get it in the files section as usual here:
http://sourceforge.net/project/showfiles.php?group_id=91993
Some (older) screenshots are here:
http://cubeengine.com/cube_intel_pda/
And the hardware you need to run this is available for example here:
http://www1.us.dell.com/content/products/productdetails.aspx/axim_x50v?c=us&cs=19&l=en&s=dhs
More details and discussion is available on the Cube website:
http://www.cubeengine.com/forum.php4?action=display_thread&thread_id=521
K-