@evleaks has built a reputation on providing new device images in advance of the "official" releases. This go around, they have leaked an image of what may be the Nokia Lumia 925, aka "Catwalk". It's a low-res image but you get a hint of the thinner form factor the Lumia 925 will offer.
The good news is that we won't have long to wait with Nokia's London event just around the corner where we expect the Lumia 925 to be announced. The Lumia 925 is expected to be fairly identical to the Lumia 920 but with a thinner, lighter body and an advanced camera.
We'll be at the press event tomorrow morning and keep you updated on all that develops.
Update: evleaks has also released a profile image of the Lumia 925. The image not only shows the thinner form factor but also the slight raise in the camera.
Source: evleaks; Thanks, everyone, for the tips!