I have just signed up and put up a test post from my iPad and I was impressed. It's fairly intuitive and fast. I needed to log on from my computer to do some fine edits to the site's look and feel, and I have still not figured everything out, but my first impressions are good.
Not sure how and why I would use it, but I will keep testing it. It links to social networks as expected.
From the site: "Jux is the ultimate place to share your photos, videos, words and more. It's like the IMAX of blogs. 100% immersive content."