What's your wackiest home-brew project? There are always interesting kitcars on eBay. I'm consistently blown away at what an impressive marketplace they have there — none of the kit-dedicated publications (even mine) have ever been able to keep up. Anyway, for those of you with some money to spend on a new toy, there are three kits up right now that I think are worth it.
All that said, when I've finally got access to a workshop again I think the first thing I'm building is a Universal Hovercraft UH-19P… Very cool, very fast hovercraft that currently holds the speed record in its class. That said, their ground effect vehicle, the UH-18PSW is really cool. Click it: