The United States Mint (US Mint) has released the 2015 March of Dimes Special Silver Set yesterday at a price of $61.95 per set. Source: http://newcoinreleases.com/2015-march-of-dimes-special-silver-set/
I realize this is not a very US based site, but there is a LOT of excitement on this set here - both of the dimes are "first of its kind" mintings of the Roosevelt Dime.