This is so cool... they have blinking LED debugging of genetic circuits: "Debugging genetic circuits We developed a strategy for “debugging” a malfunctioning

This is so cool... they have blinking LED debugging of genetic circuits: "Debugging genetic circuits We developed a strategy for “debugging” a malfunctioning circuit to determine which gate is causing the failure. This was done by creating a series of plasmids that transcriptionally fuse the output promoter of each gate to yfp." Basically if the liquid fluoresces the gate you're debugging is outputting a 1.