I have seen one Runearm on the auction house already named "Thought Spike":
http://imageshack.us/photo/my-images/840/runearm.jpg/
Are Runearms equal to Runestones?
From the Release notes:
Anyone have other screenshots from either of them?Special Runestones are now available exclusively thru crafting using Cannith Crafting devices. These magical stones allow characters to debuff enemy targets. There are three different types of runestones, and they come in four strengths.