Banzuke.com - Your Sumo Information Archive (English)
www.banzuke.com Complete banzuke in romanji from 1757 to present, Sumo Mailing List archive, hosting of Dale's Sumo Videos, Historical Artwork and more
SZUMO.HU (Hungarian & English)
www.szumo.hu Good source of rikishi and basho data and statistics
Chijanofuji's Sumo Colosseum (English)
www.chijanofuji.com Also lots of interesting statistics and more