After another two weeks of work evaluating and implementing different features / improvements / changes to TJ, I present you the TJ Gen2 prototype and shields: 

• TJ Gen2 thermal imager - baseboard (lower right corner) 
  • 37.5 x 20.5 mm
  • 2 versions depending on the included thermal sensor
    • Omron D6T-1616L (16x16 FPA)    --- $99
    • Panasonic AMG883x (8x8 FPA) --- $49? 
  • audio-jack interface (iOS devices)
  • USB interface (Android / PC / Mac)
  • 12-pin shield-connector
• BLE shield (upper left corner)
  • based on the popular $6 HM-10 module 
  • allows low-power remote connections to TJ
  • can be piggy-backed on the battery shield for battery-operation 
• WIFI module 
  • no-shield needed (simply plug a $4.5 ESP8266-based module in TJ's shield-connector)
  • allows longer-range remote connections to TJ
  • can be piggy-backed on the battery shield for battery-operation
• Battery shield
  • provides power to TJ through a standard 2-pin JST LiPo battery connector
  • charges LiPo batteries

aaaand... what's that on the lower left corner? It's a...

• Display shield
  • uses a $10, 1.5" OLED 128x128 color display
    • an <$4, 1.44" LCD 128x128 color display will also be evaluated
  • contains an uSD card slot for saving thermal images and video
  • 2 buttons
  • a LiPo charger and connector
  • Should allow TJ to become a stand-alone ultra low-cost thermal-camera :) 

The PCBs have just been ordered today at a China fab and should probably arrive late next-week.