It is a patent minefield. For example: http://www.engadget.com/2006/03/03/rim-ntp-settle-for-612-million-finally/ http://www.engadget.com/2006/03/03/rim-ntp-se

It is a patent minefield. For example: http://www.engadget.com/2006/03/03/rim-ntp-settle-for-612-million-finally/ http://www.engadget.com/2006/03/03/rim-ntp-settle-for-612-mi...