Actually our pro edition uses only json to transfer data as it has a lower overhead. The new json services in ServiceNow Dublin are optimized and fix a lot of the issues that occur today.
But yes. Not difficult to do. You actually run more into an issue with NPM because alerts show up then are removed. So you have to have a solution that can continuously poll. Then provide a solution to send updates back to Acknowledge alerts as well.
Sent from my Verizon Wireless 4G LTE DROID