1. To prepare pork, preheat the grill to high heat.
2. Mince chipotle chile. Combine chipotle and oil in a small bowl; rub evenly over pork. Combine oregano and the next 4 ingredients (through black pepper). Sprinkle spice mixture evenly over pork, and let stand for 30 minutes. Place the pork on grill rack coated with cooking spray, and grill for 6 minutes on each side or until a thermometer registers 145°. Remove pork from grill; let stand 5 minutes. Coarsely chop pork; keep warm.
3. To prepare salsa, place pineapple on a grill rack coated with cooking spray; grill for 5 minutes on each side. Coarsely chop pineapple, and place in a medium bowl. Add cilantro and next 4 ingredients (through jalapeño); toss to combine.
4. Warm the tortillas according to package directions. Place 2 tortillas on each of 4 plates, and divide pork evenly among tortillas. Top each taco with about 3 tablespoons salsa. Serve with lime wedges.