Switch the option from current to archived underneath the graphics banner of the PMC3 near the right side...
Boom... there it is on page 2
PMC2/PMC2+ 4.003.0015 General Description: Added native iPhone and iPad socket support Improved TCP Client and Server Connectivity Improved Ethernet performance Changed so that processors with DHCP on by default will autogenerate a hostname during a RESTORE.
Download Files : Download Firmware (ZIP - 1.14 MB) Last Modified: Dec 02, 2010
PMC2+ 4.001.1027 General Description: For use with both PMC2 and PMC2+ packages. Note both PMC2 and PMC2+ use the same PMC2 processor. Download Files : Download Firmware (ZIP - 1,019.20 KB) Last Modified: May 16, 2010