On instant qualitative analysis

I've been messing around with Wordle. In particular I wanted to assemble a number of definitions of "learning" and to explore their similarities and differences in emphasis. and it does a fantastic job of that;

It occurs to me that it provides a very easy tool for the quick analysis of qualitative data such as transcripts of interviews. See here, too for its use in a similar way to reveal two different positions in a political debate. I'm sure others have got there first, but it seems to have plenty of potential...