The 8th runway is already under-construction, Terminal D (DFW International Gateway Terminal) is also under-construction as well. Terminal D will open sometime around Late 2005 / Early 2006.
Check the Homepage for DFW Int'l. Apt. @ http://www.dfwairport.com
, On your left, you see a listing, go to "Information Center"
, then you see "Master Plan" http://www.dfwairport.com/planning/plan.htm
Enjoy The Homepage !