Many folks have asked for a Wordle that fits into a shape. Others have asked for “clickable” Wordles, which could be used for navigation. I’m happy to say that someone (who identifies himself only as “Alex”) has created a service that meets both of those needs. I’m not endorsing his site; I’m just letting folks know about it.
Tagul: http://tagul.com/
It requires signing up with either a new Tagul account, or via some OpenID provider, so I can’t provide a demo here. As you might have guessed from the way Wordle works, I don’t like signing up for toys.