The Io Express has been shipping for quite some time; the product was launched at NAB 2009. I believe you are having trouble locating a unit for sale simply due to the increased demand for the product.
AJA Video Systems
+1 (530) 274-2048 Intl.
(800) 251-4224 US
I did a search of every Web site I could find that carried the AJA line. Not one had the IO in stock. Some described the backorder period as indefinite. I think it’s time for AVID to open up to some other manufactures who have similar IO boxes like Matrox. Or even other boxes in the AJA line. Somebody is doing a very poor job of managing this rollout.