The 'Phones Show' FlickR group has a number of adjudicators (I'm not one of them, on purpose!), who pick a photo of the week, each week, and a winning photo of the month, each err.... month. And a real, genuine prize is then dished out from the ever growing PSC prize pool.
Anyone can join the group, it's all free, of course, see the Phones Show FlickR group home page for instructions. The only rule is that you have to have taken any submitted photos on a phone. Failure to comply with this rule will result in a) excommunication from the group and b) us 'sending the boys round'....
One of the big advantages of FlickR over other ways of sharing/pooling photos like this is that each image can be viewed in a variety of sizes, usually right up to original resolution, plus there's full EXIF data to pore over, to see how each photo was actually captured (including the device used).
There have been some stunning entries so far. Here's one taken on a Nokia Lumia 1020 that I liked - and deliberately stopping myself from choosing yet another sunset or dawn landscape(!):
And what about this dramatic shot, snapped on a Nokia 808 PureView: