Whiskywall has a piece about the Hakushu Sherry Cask bottling to be released at the end of February. There will be 4,300 bottles at about 9,000 yen each. For more info and some purchasing pointers take a look at Whiskywall`s post.
Incidentally, the Suntory press release lets slip the following titbit: Hakushu sales volume surged 111 percent in 2011 compared with the previous year, largely because of a marketing campaign selling mint-garnished highballs to young women (the market segment that calls the pipers tune, right now). Might just go off and make myself a mint highball right now