The Seven Dwarfs Mine Train is available for FastPass+ today, May 25, using My Disney Experience.
Previously, FastPass+ had only been available for the official opening and onwards from May 28 2014. Although FastPass+ is available for today, May 25, it is not yet available for any other days until May 28.
The Mine Train remains in soft opening, where it may close at any time without warning. The ride officially opens on May 28 2014.