As a update to the last post regarding the RIM Blackberry software work-around, Business Week has an indepth article about solution.
You can check it out here: http://www.businessweek.com/

In order to continue US operation of blackberry devices and servers, RIM has developed a “workaround” software contingency plan. It is a user-installed software update for the devices and backend servers which will show no difference in the way the devices operate in the current day nor will it affect any of the programs [...]