IETF Journal about RTT and R3TF
The IETF Journal, an Internet Society publication, produced in cooperation with the Internet Engineering Task Force, has in it's October 2008 Volume 4 Issue 2 an article describing and explaining Real-Time Text and the Real-Time Text Taskforce.
The full issue can be downloaded as a PDF document.
The Real-Time Text article is on page 9 and 10.
Main site IETF Journal: http://ietfjournal.isoc.org/