Zootool is a cool visual bookmarking site.
They have been fairly sucessful:
They posted on https://www.facebook.com/zootool on the 17th that they have been hacked.
The site is still down for registration and not sure how useful it is at the moment: http://zootool.com/blog/2013/05/17/quo-vadis-zootool/
Eight days down, and still counting, is not acceptable. Not for a professional website.
WordPress both .com and .org are amazing MVC for blogging. Period. Nothing else. If you want to write a magazine, post content or solely blog. You can’t go wrong using Worpress. If you want to build a tool or a web app. Forget it! Not the way to do it! Anyone that tells you otherwise, they don’t know what they are talking about.