Short message communication and collaboration is evolving rapidly and, although it enables us to be more efficient with our communication, it poses real challenges for e-discovery.

Currently in the United States, short messages can only be sent between subscribers of the same carrier. A Verizon Wireless customer, for instance, can't send a short message to a Sprint customer.

New key figures on short message services show that the two major providers are in a neck-and-neck race. Things are getting tight for X.