Have you checked out 500px.com yet?
No doubt you have heard of Flickr, probably the most well-known photo sharing site. Flickr has recently undergone a much needed facelift, which has had mixed reviews throughout the community. I find Flickr has it's uses, although I do find when searching for specific images, there is a lot of rubbish to sort through to find the gems. Some people like to get home from a holiday, dump the contents of their camera straight onto Flickr without deleting the shots that nobody should see, leaving streams of images named IMG_0159.jpg or similar... anyway, I digress.
500px is a newer site which is in a word - beautiful. It tends to attract a higher percentage of extremely good photography. Just open up the homepage and you'll see what I mean...
I finally got around to uploading some of my better shots to my account there last night, and was very pleasantly surprised to see people viewing and interacting with my images almost straight away. Within half an hour, the shot above had gained several likes and comments and made it into the 'Popular' category - reserved for for images with a higher 'Pulse'.
500px is a great place to go for inspiration, so if you have a spare 5 mins, head over and start browsing - I guarantee you'll still be scrolling through stunning photos for several hours :)
See more of my 500px images here.