Articles
Here is a small selection of articles that have mentioned the expansion pack. You can scourge these for details, but they won't make it come out any earlier =).

Previews / First Look

PcZone Preview - January 2001
Cdmag First look - January 2001
Gamespot News - January 2001

Interviews

Gamepro interview with Michael de Plater - February 2001

CA/DT Articles

Community site interview with Michael De Plater - January 2001
Press Release announcing the Expansion Pack - December 2000