BBC Released S7 Synopses
Well, for the first three episodes...
With season 7 now imminent, the BBC have released synopses for the first three episodes:
Asylum of the Daleks

Kidnapped by his oldest foe, the Doctor is forced on an impossible mission - to a place even the Daleks are too terrified to enter... the Asylum. A planetary prison confining the most terrifying and insane of their kind, the Doctor and the Ponds must find an escape route.
But with Amy and Rory's relationship in meltdown, and an army of mad Daleks closing in, it is up to the Doctor to save their lives, as well as the Pond's marriage.
Dinosaurs on a Spaceship

An unmanned spaceship hurtles towards certain destruction - unless the Doctor can save it, and its impossible cargo... of dinosaurs! By his side a ragtag gang of adventurers; a big game hunter, an Egyptian Queen and a surprised member of the Pond family.
But little does the Doctor know there is someone else onboard who will stop at nothing to keep hold of his precious, prehistoric cargo.
A Town Called Mercy

The Doctor gets a Stetson (and a gun!), and finds himself the reluctant Sheriff of a Western town under siege by a relentless cyborg, who goes by the name of the Gunslinger.
But who is he and what does he want? The answer seems to lie with the mysterious Kahler-Jex, an alien doctor (yes another one!) whose initial appearance is hiding a dark secret.