Let's start with the one that will make the news slightly more than the others, Joe Abercrombie's Best Served Cold mass market paperback cover. Orbit books released the cover today. Personally I think they misfired with this one. It looks like some cheap "suspense/horror" cover.
Next on the list is the cover for the second e-book of the Wheel of Time series, The Great Hunt. I posted the first one here (which was not much to my taste). Harriet (Jordan's widow and editor) chose a different artist for each e-book cover. Tor Books posted the cover by Kekai Kotaki. Much better than the first one. The trollocs in front are one of the best representation I've seen.
After being featured on a couple of blogs this week, Brent Weeks felt that he had to speak about his new cover. It's not the final version but here's the cover for his upcoming book The Black Prism. By the way, as Brent wrote on his website, the blurb for the book posted on Amazon is not right (written before he started to work on the book...). By looking at his site, I also discovered the covers for his omnibus version of The Night Angel trilogy and the french covers for the first two books of the series. Here a look :
Finally, let's compare the new covers for Guy Gabriel Kay next novel, Under Heaven. I go for the second one, the US cover.