Thaw shrimp, if frozen. Rinse shrimp; pat dry. In a resealable plastic bag combine Olive oil, garlic, cumin, chili powder, and 1/4 tsp salt; add shrimp; chill 30 minutes.

Meanwhile, finely shred peel from lime; juice lime. For lime slaw, in a large bowl combine the lime peel, lime juice, cabbage, and remaining salt. Set aside.

In a small bowl combine sour cream and chipotle pepper; set aside. Wrap tortillas in foil.

Thread shrimp on skewers. On a covered grill, grill tortilla packet directly over medium heat for 5 minutes, turning once. Add shrimp to grill; cook 5 to 8 minutes or until opaque, turning halfway through grilling.

Remove tortilla packet from grill. Remove shrimp from skewers.

To serve, spread tortillas with sour cream mixture. Top with lime slaw and shrimp. Sprinkle with cilantro and pass lime wedges.