Posted about this over on Scanlines, but not sure I’ve seen it over here yet.
Cat Full of Ghosts has a handy little passive video device, the Video XCHNG, on Kickstarter right now:
It’s basically a signal routing utility. So not super “exciting” perhaps, but certainly potentially useful.
And now @aladan (Visible Signals) has some modules (incl. several 1u tiles) available as add-ons too.