I am writing this review from inside FoMu to tell everyone else to come check it out. They have a great selection of ice creams ranging from standards like chocolate and strawberry to options like salted caramel, pumpkin stout, and apple cider donut.
They also have vegan waffle cones, hot fudge, whipped cream, and a variety of dry toppings.
I tried a sundae with salted caramel, rocky road with hot fudge and salty candied walnuts. It was excellent. I was particularly impressed by the hot fudge. They have really nailed that thick rich creaminess I remember from non-vegan hot fudge. The ice cream itself is also quite good. It's not the absolute best vegan ice cream I've ever had, but it's much, much better than anything you'll find at a co-op.
However, one issue some people might have is that the vast majority of flavors are coconut based, and have a bit of coconut flavor. They do offer a few nut-based flavors as well, but your options there are limited. If you detest the flavor of coconut, you may be less excited by FoMu than I was.
I look forward to trying this place again on a future visit to Boston.