HappyVan: To be honest, I wouldn't depend on the phone for photos.
I would slip the Nikon AW110 into my other pocket. Its footprint is even smaller than my Sony Esperia S. It's rain and freeze proof, and comes with wifi.
You can even take semi-submerged shots of a flood. Of course, it has an optical zoom.
On a budget, there is the Nikon S32 $129.
Willing to carry a chunkier camera? There's the Nikon One cameras with PDAF and able to print a clean 18x12. The J1 kit is available for $249
I have two DSLRs and my Nokia Lumia 1520. If I need image quality, then I will take the D800E. For snapshots my Lumia is most time with me. There is no need for another P&S camera.
HowaboutRAW: No mSD card slot; bad idea, assuming it shoots raw, like the 1520.
Ever uploaded a 20MP RAW file to Skydrive? Not a real fun...