Conductive Ink looks like a production grade solution to minor circuit board design errors that would normally be solved by green wiring.
See also: electrical tape.
Flexible copper laminates look a little expensive but I also don't need 10 meters x 500 mm to make one replacement flex cable or some arbitrary new sensors.
These connectors are also pretty awesome.
8/21～22にM2Mアプリ構築セミナー開催、センサ付き3G通信ユニット進呈 - ニュース
2 hours ago