By now you should know the drill when it comes to ordering DVD's of high-profile Thai martial-arts movies like Ong-Bak 2 in Hong Kong. Though the initial specs might list English subtitles, if you're betting on the subs being there, there's a good chance you'll lose that bet.
Such has been the case on the DVD's of Tony Jaa's (and Jeeja's) movies in Hong Kong. The distributors are asked to leave the English subs off in anticipation of sales to North American and U.K. outfits.
Update (April 26, 2009): And finally the DVD is available in Hong Kong. But no subtitles. However, it is available with subs in Malaysia.
As far as I'm aware, Ong-Bak 2 does not have distribution in North America -- The Weinstein Company, not digging the period setting of the film -- backed out of the deal. And that was long before Tony's troubles toward the end of the production. But with film-market season upon us, things may change pretty quickly.
By the way, Ong-Bak 2 makes Jason Gray's best-of non-Japanese movies on Midnight Eye's list for 2008, and he says Chocolate was great fun too.