What I've created is a spin (no pun intended) on the traditional rectangular Risk game board.
I have on occasion been stuck being the guy on the wrong side of the table during a 6 player session, having to read Kamchatka upside down for two hours. I've also been the clumsy dude, knocking adjacent players pieces all over the board. First world problems, I know. But problems nonetheless. I'm all about efficiency and the magnetic rotating Risk board solves all of those problems with the convenience of being able to move the board around with your pieces held in place.
You can make your own. You can add your own personal touch and get as creative as you want. This is how I made mine.
First let me give you a rundown of all the materials/tools I used.
1/2" bore bit
3/4" thick 26" diameter table top: http://www.readytocover.com/26-inch-round-plywood-table-top.html
Golden acrylic paints, glaze, and gesso
paint markers (gold for borders and red for sea paths)
Rust-oleum Magnetic Primer
artist tape/painter's tape
Krylon Crystal Clear acrylic coating
1/2" carriage bolt
4x 3/8" nuts and bolts
24x 3/8" washers
1/2" bearing: http://www.vxb.com/page/bearings/PROD/Kit7494
(imitation) gold leaf and adhesive
stylus for embossing country names (if you can call what I did embossing, I dunno)
5mm x 5mm x 1mm magnets