So there's this storefront Guatemalan bakery across from the CompUSA on Market St. in Brighton. I stopped in for the first time last Saturday, quite fortuitously as it turns out. Usually they seem to have dry-ish breads and sugar cookies and Nescafe; Saturdays there is a hand-written sign that says "Sabado-tamales". Two bucks each, chicken and pork.
I tried the chicken and they are huge, fresh, and very flavorful. Highly recommend it!
Also there was a beef/veggie empanada-ish offering which I found way too greasy.