Didn't we see some new concept art of a daedric shrine? There was that azura poster and then there was that live demonstration of one of their concept artists detailing the shrine of nocturna...
Maybe i'm wrong...my memory is a bit foggy.
As the post below says, it was a statue of Mara.

I think what you're referring to was actually the statue of Mara.
I hope we see all 18 of them (with Jyggalag and Sheogorath now are entirely separate entity, so there's a total of 18 Daedric Princes, right?). Some shrines could be easier to find, while others being much obscured.
Also, I recall that there was a thread on this forum section where OP presented an interesting idea for a Daedric Shrine quest (for Mephala, I think) which involves the player's character being transported into some pocket realms where he/she had to battle every single named NPCs that he/she murdered (as in the victims being unprovoked/innocent) from the start of the game, up to the point before activating the quest line, with the reward(s) for the less murderous characters being much smaller, and much larger if you're playing the more homicidal ones (on the other hand, the quest giver/Daedric Prince would simply not respond to your summoning if your character's hands are clean, so to speak).
That is a fantastic idea. And no. It's 17 now. There were 16 princes, but since Sheogorath and Jyggy have became separate it makes it 17.
- Azura
- Boethia
- Clavicus Vile
- Hermaus Mora
- Hircine
- Malacath
- Mehrunes Dagon
- Mephala
- Meridia
- Molag Bal
- Namira
- Nocturnal
- Peryte
- Sanguine
- Sheogorath
- Vaermina
- And now Jyggalag.
I wonder if Jyggy has got himself a new "realm" now. Considering the new Sheogorath rules of the Shivering Isles (which used to be Jyggy's realm) Can Daedric Princes just create realms willy nilly? I know Dagon gave a pocket realm to Mankar Camoran but that would still be technically part of the deadlands.
Edit* Had a bit of a brain mess up on the number of princes.