Here are some news about the Expo2000-area:

http://www.expo-park-hannover.de/images/02_03_luftbild.jpg

http://www.expo-park-hannover.de/images/01_home_1.jpg

After the Expo2000 the Hannover-University uses many pavillions.
http://www.familie-wimmer.com/luxus/m02/deutsch.jpg
http://www.fh-hannover.de/imperia/md/images/foto-cd/expoplaza/standort/aussenansicht.jpg

IKEA and BMW have opened stores:

http://www.mathai.de/snapshots/snapshot_cam4_h_2.jpg
http://www.zechbau.de/de/_bilder/content/referenzen/gewerbe-industriebau/HTC/BMW_Expo_1.jpg"]http://www.zechbau.de/de/_bilder/content/referenzen/gewerbe-industriebau/HTC/BMW_Expo_1.jpg
http://www.zechbau.de/de/_bilder/content/referenzen/gewerbe-industriebau/HTC/BMW_Expo_1.jpg

Mousse-T has established his music studio, working with SimpyRed, Joe Cocker, Emma Lanford, Timbaland, Missy Elliot and more.
http://www.peppermint-pavillon.de/_willkommen/bilder/Willkommen_01.jpg

Ferrarie will also open a branch. This fall they will start building it.

Some other webcams:

http://www.mathai.de/snapshots/snapshot_cam1_h.jpg
http://www.mathai.de/snapshots/snapshot_cam4_h_3.jpg
http://www.mathai.de/snapshots/snapshot_cam4_h.jpg
http://www.mathai.de/snapshots/snapshot_cam4_h_4.jpg

Erm... isn't this built already?

It is, but it's about the future of the area