OK.... So I'm partial to gadgets and gizmo's... But when I saw this, I can imagine a bunch of ham operators running around on an ARES/RACES/SAR mission. A ball cap with solar charged LED's built into the visor. This can be handy for activities that involve having both your hands tied up.
I found this listed on dvice.com. If you haven't been to this site, your missing out on what up and coming in the gadget word. when you have a few minutes, feed the geek in you and take a look at this fun site.....
http://dvice.com/archives/2009/06/solar-led-cap-i.php