Wordle.net does some pretty interesting visual things with words. I haven't decided whether its useful to writers or just another time waster, or possibly a little bit of both. But it is interesting to see which words I used most often in the first scene of my novel. I like the prominence of words like "trees," "world," and "daughter." I wasn't aware I used "upon" that much. It does filter out some "common words" and I suppose "upon" is not among those.
I'd love to see what other writers' excerpts look like!