Q: What are logos good for?
An image is processed by a different part of the brain than a word or phrase, making it both memorable and evocative in ways that are distinct from the name of your company. Having a logo for your company or product makes it more memorable and allows you to suggest connotations that can be put into words.
I have put together a table of a couple of icons or logos that we used and the word or phrase that the replaced. The first version of the SKMurphy logo was just a text treatment as was the first version of the Bootstrapper Breakfast. You can judge for yourself if adding some simple artwork changed your opinion of what each represents.