According to @evleaks, Microsoft hasn't given up on the Surface Mini yet. Sources close to the blogger report that the production of the Surface Mini has resumed. At BUILD 2014, it was originally assumed that Microsoft would unveil their smaller Surface tablet to the world. Instead, we got treated to an even larger tablet, the Surface Pro 3, that is also a brilliant product.
Previous reports suggest that the Surface Mini will sport a 7.5-inch display and come bundled with a stylus. Not much else is known at the moment.