craftgrrl | water-proof mittens?

i live in seattle, where it rains a lot. in the winter when it gets chilly, my wool gloves get soggy and uncomfortable.

i've decided to try and make some water-proof mittens to wear over my wool gloves and wanted to get some feedback before i start.

i'm thinking of finding a nice, cheery-patterned oil cloth fabric. do you think that would be practical, or can you suggest something else? i won't really need a lining since i'll wear them over other gloves, but on days when it's not too chilly i might wear them alone so i might consider some flannel or something.

does anyone know of a sewed mitten pattern? i'm expecting to have to wing it, but i'll take any resources i can get ^_^

i'll probably try to make a water-proof purse or tote bag to match, since my purse also gets soggy in the rain, but i've done bags before and don't think i'll need help with that . . .