Todd and Mark are building another vacuum-tube guitar amp. They go through a lot of beer in the course of these projects, but I do enjoy seeing the progress during the design and implementation stages. I will admit, however, that I don't particularly care for the testing stage and try to find something to do outside the house at those times.
Mark does a lot of the woodworking for the cabinets and you can see photos of the construction on his blog. He also writes about fly tying. While I have no urge to try fly fishing, I've always been interested in fibre crafts. Making a fly out of elk hair is not all that different from making a Rhodes stitch with silk, is it?