Smashing Pumpkins
Official Smashing Pumpkins Website
Smashing Pumpkins Fan Collaborative tour history for SP and Zwan, lyrics to every song known by both bands, and lots of other cool stuff
Siva
Netphoria

Zwan
Official Zwan Website
ZwanMusic.net An awesome Zwan Website made by a fan with news, tour info, streaming radio, bootlegs, etc
Poets of Zwan Zwan site with mp3s, lyrics, news, etc and links to other sites