Hey marky- I started tagging words with 'vcccv' patterns in January 2010. I've also tagged words as ch sounds like k, rh, and one-dollar words. I know C and V are used academically for sounds and not letters, and I made some linguists mad, but I wasn't trying to record the sounds, and I don't know what other system I might have chosen. I think organizing things which appear unrelated can bring out new features that have not been visible or considered. Mendeleev, Linneaus and Roget are my heroes. I'm not saying I accomplished anything with this idea yet, but tagging words in this way (which mollusque called convowel) was very cathartic for me at the time and I'm happy I had wordnik as an outlet. I've been thinking about possible uses for this list recently. No success yet, but you can watch me flail on tankhughes.com.
convowel tags .. something like this could easily be done automatically with a simple computer script, and then cross referenced in a database to automatically add tags, but still not sure what the benefit would be. spelling in the english language is quite chaotic and tricky..