http://www.wordle.net/. It will then generate this word picture for you. The bigger the word the more times it has been used.
The wordle above is from this blog. I obviously really like dogs, the Hubs, Christmas and the word 'just'. I suppose I should try to cut back a bit. It's just so easy and just so good.
Pretty cool, you should check it out sometime. Oh and I should mention, you can change the colors, font, direction of words and delete words. So plan to spend a bit of time with a wordle, they're great!
There is also a gallery that has wordles that others have created, here's a fun one. They took the constituion and dumped all the words into this wordle thingy (really technical, I know):