Windows CE solution
From Gumstix User Wiki
As the only operating system that Gumstix, Inc. provides and supports is Linux, any solution and technical support for Windows CE on the Gumstix Overo series can only be available from another company.
To find information about what solutions are being offered for Windows CE, review the information posted in this Windows CE BSP's from 3rd parties section of gumstix.com.
