You can see the first three ebook covers here :
The Eye of the World
The Great Hunt
The Dragon Reborn
Joe Abercrombie also revealed a cover art today for the upcoming UK mass-market release of Before they are hanged, the second novel of his trilogy. The art is from artist Chris McGrath and Designer Laura Brett. He posted this on his blog.
You can take a look at the cover for his first book, The Blade Itself in UK mass-market here.