Implemented it using SquareSpace, which I’ve found very easy to work with, though a bit quirky, which you get used to, and their customer support has been fantastic.
Here’s the new look (use Chrome or FireFox, there’s a problem with IE that SquareSpace is working to resolve.)
I’ve put together an article (http://www.codeproject.com/Articles/807414/Automating-Semantic-Mapping-of-a-Document-With-Nat) that discusses a couple options in visualizing the relationships between keywords and sentences of documents parsed by AlchemyAPI. Here’s a screenshot of “adjacent sentence keyword visualization”:
and one of the force directed graph “keyword association” visualization: