Adopting a standard board level (external) memory interface will yield peripheral hardware products from multiple vendors which interface seamlessly with development platforms from multiple vendors.
PISMO™ Compliant Solutions
Platform Baseboard for ARM926EJ-S: http://www.arm.com/products/DevTools/VPB926EJ-S.html
This board was designed before the PISMO v1 specification, so the static memory expansion connector is not totally PISMO compatible.