HTML5 Diagram Editor (with HTML5 Canvas + Javascript/Jquery)

Hello. I'm looking for a quality javascript and HTML5 coder to code a diagram editor similar to the one you see here: [login to view URL] The code should be original. You should have familiarity with the HTML5 Canvas functionality. The basic functionality I'm looking to get is to have the shapes connectible via lines, so that when I drag one of the shapes, all of the shapes are still connected (see image). If you have any questions, please let me know. Thank you.