KWMap is an interesting site that applies visualization to help us identify better keywords for web searches. Basically, you enter a keyword to start, which appears at the intersection of two strands of related keywords. From there you can select any of the related keywords to "recenter" a new list of keywords. The visualization itself is not dynamic (i.e. it always shows your keyword on the continuum of the same two strands), but is somehow much more appealing than other keyword generation sites.
