I'm a huge fan of having an alti on my wrist, but I'm also mindful of the risk of getting my hand entngled. I've tried all sorts of mountings, but nothing is more visable to me than on my wrist. The best solution I've found is mounting a Neptune on my hand. I sew a window on the back of my glove. The trick is to use a glove that has an elastic back, and insert the alti from the inside of the glove. This leaves a very sleek exterior. I've used this set up for about three years now. I've had one canopy wrapped around that hand, and I was easily able to pull the cutaway past my alti. I don't have a digital camera with good resolution, but I'm including some crappy camera phone pictures with this post to try to illustrate the glove mounting I'm using. The first picture is an exterior overall, and the second picture shows the slit on the interior of the glove that allows me to insert/remove the altimeter. Sorry about the poor image quality.
CReW skies,
-Steve