Yesterday's revelation that Verizon may soon be enforcing usage-based data plans came as a slap in the face to many, but there may be at least one speck of sunlight shining through the dark clouds above. Screenshots appeared today, purportedly from employee communications, that would go a long way toward assuaging our worst nightmares: Verizon is indeed planning to mirror AT&T's policy of letting current customers hang onto their grandfathered data plans -- even when renew