Geodesic Airolite boats plans…
Rick writes “How to make ultra light weight boats and canoes. Plans are available but there are enough details on the web site for you to go from there.” From the site: What is Geodesic Airolite Construction? It is a simple, inexpensive, low-tech, forgiving system utilizing some exotic materials. The sequence consists of building a simple rugged wood framework, braced with triangulated KEVLAR® roving strands. This tough basket-like frame is then covered with Dacron. This is a first cousin to sail cloth; except it heat shrinks. It is a super-weight, airplane wing covering type of fabric, used on crop dusters. Link.
Redbluefire posted some photos on Flickr of his experiences riding out hurricane Wilma – his power went out and with the phones only working he used the phone line to charge up the Walkie Talkie watch gadgets “…the two lines in the phone that supply power, Red was positive, but to my suprise the ground was not black, but GREEN! After that, it was all a matter of opening the watch, checking the pinout, and twisting the wires to hold onto the jack inside. I need to communicate, and sometimes a laptop just isnt worth wasting for idle communication.” 
Maker Rich Gibson is welding up a neat looking chopper bike – on the MAKE flickr photo pool he writes “Chopper bike ‘complete.’ I am going to lower the seat some more. It is still basically unrideable by mere mortal. I’m going to make a new front fork that is shorter. Keep the original one for ‘special’ occaisions.” 
Here’s a blog devoted to making Railguns (Railguns utilize an electromagnetic force called the Lorentz force to propel an electrically conductive projectile that is initially part of the current path) – the site has tons of pictures, videos, and links. 
A Maker writes “A Dutch, (although in English), site dedicated to making kites. Plans for many different kinds available.” The plans section is loaded – single lined, dual line, triple line, quad line, buggy, tail, parafauna and other plans for kite making. 
Colin sent in this great ski building HOW TO site “Always wanted your own pro model ski, but can’t ski like a pro? Why don’t you just build it yourself? It sounds crazy, but building a pair of skis (or a snowboard) is not out of reach for the average garage tinkerer. All that is required is some time, a little effort, and some patience to build the equipment and prepare the materials for making skis. In the end your hard work pays off, and there is no better feeling than skiing on a pair of skis that you designed and built yourself.”