In his post (and subsequent posts on his blog) he explains how he's obtained his own Dimension uPrint 3D printer (it's one of the least expensive commercial models available today.) He's using it to print out various designs for his NanoSeeker prototype - that's a Micro AUV (Autonomous Underwater Vehicle). Great idea, and we wish Jon all success. But then it struck us:
There's a guy using a home replicator to build robot submarines!
If it isn't the 21st century already, it must be close.
Via Jon's Place