The Shaman tier 10 set is called the Frost Witch, and this definitely fits with that motif. After looking closely at the image, Sacco and I think the horns of ice on the head and shoulders do not appeared to be textured, so that's something we have to look forward to being completed in the future.
The shoulders also feature what appears to be a two ghost-animals jutting out of them, very likely a periodic effect that we've previously seen in the BC warlock set.
Patch 3.3 is the last major patch of Wrath of the Lich King. With the new Icecrown Citadel 5-man dungeons and 10/25-man raid arriving soon, patch 3.3 will deal the final blow to the Arthas. WoW.com's Guide to Patch 3.3 will keep you updated with all the latest patch news.