Interference
Great U2 site with the biggest U2 forum on the web.

U2.se
The Swedish U2 site

U2 Start.com
The biggest U2 concert dowload site

@U2
Great U2 site

U2.com
The Offiicial U2 site

U2 Tours
Every U2 show is documented on this site

U2tour.de
Great U2 site

U2log
Great news page about U2

more links to come...