I found this on the USDA website in relation to the announcement in February 2008 that BNC was given the go ahead for conditional approval in the US.

USDA AGREES TO GRANT CONDITIONAL LICENSE FOR E. COLI VACCINE (117 wires 
2/5) USDA has notified Bioniche Life Sciences Inc. that the latest data for 
the company’s E. coli 0157:H7 cattle vaccine meets the “expectations of 
efficacy” standard and is eligible for a conditional license, provided 
Bioniche develops a plan that would collect sufficient data to move the 
product to full licensure.  Bioniche said its vaccine is the world’s first 
that may be used as an on-farm intervention to block the amount of E. coli 
0157:H7 shed by cattle.  Shares of Bioniche, a small Canadian 
biopharmaceutical company, jumped 50 percent Tuesday after USDA approved 
data related to the vaccine, paving the way for its use in the U.S. by the 
middle of the year.  


Its interesting, that the BNC news release did not state anything about being available 
later this year.

http://agnews.usda.gov/archives/020608.txt