As of this writing, the servers still haven't come back up yet, but apparently when they do, Drysc says we'll have more places to obtain all that Arena gear we're all lusting after. In addition to the Arena 52 vendor, there will be vendors outside the Nagrand and Blade's Edge arenas. And the Crimson Ring (did we ever determine if that was the group actually putting on the Arena fights?), if that is their name, will also have a vendor available in Gadgetzan.
Not exactly earthshaking news-- as busy as the vendors were when new stuff went on sale, I don't know that there was much traffic there when things slowed down-- but welcome news to Arena gear purchasers just the same.