I have a credible report that the Tres Hermanos taco truck that used to be parked at 34th and Division is now stationed across from Di Prima Dolci bakery on N. Killingsworth. My wife confirmed it is the same one, because she went to it often enough that she knows the proprietor. She's a huge fan of the their tacos al pastor on--of course--fresh, made-to-order tortillas. It's a more fiery version of al pastor than I've had elsewhere, but very good.
Long live the three brothers!