The ROM files are available through the same options that previous Handspring ROMs have been provided. All specifications for Visor Edge, including the new Edge connector, can be found in the new Product Guide. Please note that the Edge connector is not part of the Springboard specification.
Springboard compatibility is provided through the detachable Springboard slot.
There is a self-compatibility testing process for modules that use the Edge Connector on the Visor Edge handheld. All the details are located here.