NASA has a project going to Evolve Antenna Designs.
Some of these defy conventional wisdom and come out looking very cool and
performing significantly better than standard designs.
Kevin Kelly runs a blog called
Cool Tools that lists all sorts
of cool stuff. Here's a brain dump of things that are I thought were
especially useful or just neat.
SmallParts.com has tons of fittings for
interesting projects (Copper tubing, Lead bricks and the like.
Even cooler is United Nuclear's
Chemical section which has everything you need to make your own fireworks.
NASA has a project going to