A while ago I posted a request for corn tortillas in the area for every day use. I found some really great ones the other day -- very corn-y tasting, and delicious. Great texture, I would say average thickness.
They are from
La Finca Tortilleria
3801 Foothill Blvd.
I found them at the mexican grocery store next to Priya in Berkeley (university and san pablo - 1 block south)