Have you hard back on this issue? I don't see in the FAQ that they do not support U.S. Bank wire transfers... Have others used this payment method successfully? I wonder if it just takes a long time to process...
On the main website they do indeed fail to mention anywhere that they don't accept U.S. wires. However, if you go to their "support" site, you will see on the FAQ there:
https://hdbtce.kayako.com/Knowledgebase/Article/View/30/0/deposit-methods-usd--eur--rur