Lokesh Dhakar, a designer, was looking for a visual representation of what makes up the many different types of espresso drinks.
Unable to find a single source for the information, he pulled together the data from many sources like coffee specialists, drink houses and wikipedia to produce a very handy visual chart. Below is a quick screen capture with a link to his higher resolution version on Flickr. As you can see, he has covered a nice variety from what we think of as a regular espresso through to drinks containing many ingredients – 9 in all.
Lokesh’s site is here as well…