WORDLE has a function that allows users to submit any del.icio.us user name to make a non-linguistic representation of bookmark tags. You can analyze the use of various tags within your bookmarks and look for areas of great emphasis, synonymous tags or areas of little emphasis. Each of these areas of analysis can drive future teaching and writing related to your professional development plan and the school's curriculum map.
I created my delicious WORDLE that could be used formative assessment, summative assessment or self-assessment by analyzing this snapshot from November 10, 2007 of n2teaching delicious bookmarks
Here is another version of the same set of bookmarks on the same day that contains more words. Controlling the number of total words is an aspect of WORDLE that you can change within the layout function. Hopefully, these ideas will lead you to think of more ways to use WORDLE as an interactive tool, not just a toy.