Tonight I aim to get some bluetooth radio goodness going by hacking an old Jabra bluetooth earpiece that has singularly failed to of any use in taking calls, and connect it up to a little amp circuit I built years ago as an Altoids tin amp for my guitar. I 'll then connect the amp to the lovely Celestion speaker in the old Hacker radio. (One of the fascinating things I found when dismantling was that the "tone" control was provided by a wad of folded loo roll)
I have also impulsively ordered a silver nitride 12V igniter which was dangled in front of me on twitter by Cool Components. I actually do have a project to add this to... ages ago (2008) I built a "fireball shooter" for Dom. It uses Flash paper and flash cotton (not Adobe Flash) and an RC glowplug as the ingition source... but that proved unreliable, so we rigged a bit of fuse wire and a higher voltage source.
I'm already thinking of how I can make it into a repeater, prehaps with a rotating barrel?
I dug out this old video which shows the raw power of our Daring Fireball Shooter...