Joe Dale has provided a quick Slide Share of directions for using Wordle. (This is best seen full screen by clicking the tiny screen at the bottom). Nik Peachey has also posted some intriguing ideas on how to use Wordle for English language learners. One tip that will help you use phrases is to join them with a tilde in between.
Another tip is that if you want the size wordle you see here you need to take a screen shot of your creation, turn it into a jpg. picture through a program like Paint and then use the jpg. to upload to your blog.