Julia Galloway. Although I've not touched one of her cups, I think they are amazing. Julia is also quite a swell lady. Her website is a good resource for links and she has a very handy handbook on you have you MFA.. now what. (it's not titled that, but that is what i call it around the house) www.juliagalloway.com
Joy Tanner. I have a wood fired tumbler of hers and it is so much fun to hold. I love the textures on it. (also coveting one of her black tumblers at the moment) (http://www.etsy.com/view_listing.php?listing_id=18615757) Her work can be found on etsy.