Jon Nordby demoed this idea with http://flowhub.io/ a couple of weeks ago: http://youtu.be/wCdKukf-dHI

1. Tap tablet to Raspberry Pi with NFC tag

2. Pi serves Flowhub IDE (noflo-ui) with the currently-running graph, ready for editing

This demo drops you directly into the source, but could easily have an interface layer first. It's just a link.