Eto naman yung sa akin, my second revision, actually may 3rd minor revision ako, the tact sw is already side mounted so that its still accessible when a shield is placed on top.
Optimized for GSM/SMS development. With on-board level converter for direct TTL interfacing to GSM modems/modules w/ not so usual voltage levels and 2-UART interfaces, 1x S/W uart and 1xH/W uart or 40-pin pics w/ 2x h/w uart.
Arduino style siya but more generous on the shield space. All the pins of the PIC are brought to the sides via both male and female header connectors for greater connection flexibility.