The Complete Seventh Series Box Set features three never-before-seen minisodes. Thanks to the earlier US release they have already found their way online.

Writer Neil Gaiman provides some details on the Rain Gods scene:

For the puzzled and curious. The lost Planet of the Rain Gods sequence from THE DOCTOR’S WIFE, which was drawn by Mark Buckingham as a comic featuring the Doctor and Amy and Rory in the 2012 Doctor Who Brilliant Book, was then rewritten by me as a Doctor/River minisode for the DVD, and then that script was filmed more or less given some limitations of time and budget, does now sort of exist. (It’s credited to Steven Moffat as writer, but then, they’ve credited me on the box as writer of The Name of the Doctor which he wrote and I didn’t, so there you go.)

See River and the Doctor in Rain Gods below:

Clara and the TARDIS:

The Inforarium, is below: