Tagxedo offers you a way to make Wordle-like word picture creations but, in many cases, even better.
Here are a few examples of the word pictures Tagxedo created, based on my blog post, 32 Great Reasons to Read a Good Book.
Spelling the Word Joy
Creating the Shape of a Heart
A Standard Word Picture
You can use word art like the above for your Twitter profile image, Facebook Timelines, or Google+ headers as well as to illustrate your blog posts.
As you can see from the images above, you can choose various color schemes, word density, simple images, and word alignment to create your word pictures.