With my recent empennage order, I too received no word. The day after I faxed my order there was a charge on my credit card. After 5 days, and still no word I became worried... was it actually Vans that charged my credit card? (yes, the charge said Van's, but you never know these days!) So, like many others I'm sure, I contacted them, and they confirmed. I received my letter a few days later.
Van's seems to be big on only contacting them with legit questions/concerns due to their call/email volume. I think if they would send a simple standard email letting the customer know the order was received, they could eliminate a good portion of those calls/emails.