As wet as this season has been I have been trail running trying to stay sane.
I picked up a pair of otto spring gators to keep snow and water outta my shoes.
The only thing I can say about them I did not like is that they came with a string to tighten them down around the bottom of your shoe. I replaced that with a piece of shock cord.
REI Has them on sale for $12: http://www.rei.com/product/711879
Although last week was warm and dry. I mountain biked on singletrack and it was dry and perfect.
Good idea on replacing the tie string with a shock cord! I bought a pair of Liberty Mountain ankle gaiters and they worked great, but that was my only qualm with them, was that the tie string was a little awkward.