Conversation so far:
What happend in 2001 with Billy Corgan?
Following a brief stint touring with New Order in the summer, Billy Corgan reunited with Chamberlin to form the band Zwan with Corgan's old friend Matt Sweeney in late 2001.
What music did Billy Corgan's band, Zwan make?
Zwan's debut album was described as an efficient exercise in the kind of American alternative rock with big choruses that makes the boys at the front jump up and down.“
Are there any other interesting aspects about Billy Corgan's band, Zwan besides the release of their album, Mary Star of the Sea?
Billy Corgan's band, Zwan formally announced a breakup in September 2003.

Question: What else happen after the break up
Self-contained rewrite: What happened after breakup of Billy Corgan's band, Zwan?