You see word clouds all over the place. Wordle does an excellent job of creating word clouds, but I was introduced to another site that made it so easy.
Tagxedo took the words from my blog and enclosed them in the shape that I could choose, a speech bubble. You can easily modify the colors, theme, fonts, orientation, and layout. There are many choices for shapes, and you have the ability to save into different sizes and formats. I would recommend this site for easy creation of a cloud that you could use to illustrate your point.
The thing I found quite helpful was that you could bring the words in from a website, a blog, a twitter account, a delicious account, etc. You can also cut and paste your text from other sources as well. Give it a try. I think it is an awesome way to illustrate frequently used and key words from your writing. Once you submit your words for processing, you will soon see the shape you asked for. All of the characteristics of the shape are then modifiable, so you can make it look the way you want.