Some weeks ago I got a Freescale iMX53 Quick-Start board populated with an iMX535 (Cortex-A8),
1GB RAM, running @ 1GHz, including a dedicated power-management-IC. . For further information look here:
http://www.freescale.com/webapp/sps/site/prod_summary.jsp?code=IMX53QSBIt comes with a board support package on micro-sd card, from which it boots an Ubuntu 11.04.
In fact it is not as cheep as an Raspberry Pi, but the capabilities of this board are much higher.
For instance there is a SATA port as well as a JTAG port for professional debugging. Also VGA and
LVDS outputs for video are present.
Up to now I'm digging into the hardware features of this processor. Next step will be to learn about
the boot process - as far as I know, u-boot is used. There are so many peripheral devices inside, which
have to be unveiled.
From my point of view, a taller linux system than Ubuntu might be a good alternative way to run this board.
Regards
xyz-worx