I have learned a ton here and really enjoy the community so I feel that I should contribute something. Hopefully it will be useful...
I unfortunately don't have any awesome machining skills like Dutch, so I don't have a new invention (yet). I ordered a big spool of shock cord for some projects and thought someone else may want some.
It is 3/16, about the size of 550 PC, black nylon wrapped shock cord.
I will ship 30 feet of it to the first 5 responders. CONUS only please (sorry everyone else). You could use this for a ton of applications. The roll is on its way, so it won't go out immediately, but if you can be patient, it will come.
Thanks to everyone.