After relatively brief and painless trip to the Somerville department of Traffic and Parking - would you believe a parking ticket from 1996? - I dropped in at the recently opened and oddly capitalized iYO cafe in Davis Square. At iYO you can make your own waffles and extrude your own frozen yogurt. Fortunately for all concerned, the coffee making is confined to behind the counter. I combined some French Vanilla (since Davis Square is the Paris of Somerville) frozen yogurt with a double espresso for a makeshift affogato.
I have yet to make my own waffle, but I can give iYO high marks for decor, friendliness and coffee. They've also got a community room and art gallery going on in the back. Operating a cafe in Davis square a block from Diesel and Starbucks is going to be a challenge, but I have a good feeling about these folks. Drop by and check it out. Since their website omits it, I'll note that the address is 234 Elm Street, across the street from Martsa on Elm.