bradstewart: I keep up to date by flashing the latest firmware for the DBT CSC. It is usually the first to get each new firmware. It is part of the same OXM firmware group as the NZ carriers so it is the exact same thing they will be rolling out eventually. Usually get the latest security patch a couple before the 20th of each month this way.
Same thing I do ;) the xsp CSC was really lagging behind others.