My friends from England knew exactly what this beer was when it arrived in the US on March 11, 2004 in time for St Patrick's day that year. Thanks to Guinness USA, the owner of Smithwick's (pronounced "Smiddick's"), this traditional Irish Red Ale first appeared in pubs on draught in "key markets" in 2004, but is now even in my local grocery store. This version of Smickwick's is brewed by Diageo owned Guinness and was inspired by John Smithwick's original recipe. John Smithwick founded a brewery next to the St Francis Abbey near Kilkenny, Ireland in 1710 and the brewery has been in operation ever since (but it's not clear to me where the Smithwick's for the US market is being brewed). Guinness acquired an interest in Smithwick's brewery in the 1950s. They took over the company in the 60s and have had sole control since the 80s. According to Michael Jackson, the bottled version of Smithwick's contains 10% corn syrup.
Sources: "Voice of the Vine: O'Brewing We Will Go" by Lou Campoli, published in The Rye Record on March 9, 2006. "Here comes Smithwick's" on Realbeer.com. "Brewery with its own abbey - it must be Ireland" by Michael Jackson (1993).