The angband newsgroup (rec.games.roguelike.angband) is the informal world andband headquarters. This is the place to go for discussions of both gameplay and development.

Thangorodrim
The official Angband site, with lots of information, downloads and links. Also the official site for Zangband, a popular Angband variant.

Angband Variants Page
This is a great site summarizing a large number of variants. Links are provided to variants' websites and downloads. This is also the Amiga Angband and variants website.

angband.oook.cz
A simply unbelievable resource for players of Angband, Angband with JLE, EyAngband, Gumband, OAngband, PernAngband, and ZAngband