just a flat peice of plywood with a handle cut in the top. a carriage bolt and a wing nut to hold them on. i do lay cardboard between the blades as the carbide teeth are thicker than the blade itself
I use drywall screws on the rafters/supports to keep them up out of the way. Just make sure you use a long enough screw and a flat washer large enough so the blade won't bounce off, any put the screw in an an angle so you have to lift the blade up and off. I use 4" drywall screws and larger 1/4" washers. Works great!
I currently have mine hung up on nails. When/if I ever get a real table saw to replace my POS craftsman 8" model on a B&D Workmate, i'll incorporate blade storage into the side of the saw or the stand I build to put it on. Until then, nails it is.
This is where I need to organize and figure out a better way to store my blades also. I'm ashamed to admit I have about 50#s of blades just stacked in a old milk crate on a shelf in the garage.
Here is what I built. Made it with scrap I had laying around one day a few months ago. So you could make a better one if you buy lumber for it. Also one of the slot seperators is a blade still in its plasic liner because I ran out of OSB. the Blades on the right are 14" for size refrance.