#2 - The Display
Well that was both easy and hard. Making IDC cables is very easy. Simple cut the cable with scissors and, making sure you align the striped bit with the little triangle on the plug, poke it through the jaws till it's flush with the other side. Then squeeze it together. Make sure you do it evenly (a vice is good) as if you don't you may snap the side clips. So use a big set of pliers or something you can get even force. Then fold the cable over the top nice and tight and push on top locking thingy.
I made cables up and looked at the pinout on the OLED. Pin 1 was nearest to me so I put the cable on with the stripe at pin one. Plugged it into the Core and nothing. Hmm, stared and poked, replugged, stared at solder joints. Tested with meter and got funny readings. Then found a post about 3.3v and set lcd_type 0x02. I started playing around with that and managed to get one display up. No luck on the other. After hours of staring, poking, reflowing joints, reading schematics and testing I discovered the 5v OLED's should really be 5v after all. Who...would....have....thought?
Tada!