They never officially broke up. Maynard has Tool and Puscifer, and a fucking winery to keep his crazy ass busy. Billy started Ashes Divide, maybe to keep himself busy when Maynard is doing other things, but continued to write material intended for APC to do. Damn near everyone else in the band has circulated. I am very eager to hear how James Iha sounds with the band - the last time I saw him in concert was my very first show in '96 back with the Smashing Pumpkins (minus Jimmy Chamberlain. Fucking heroin...). Matt McJunkins is on bass... I don't think I'm familiar with his work, and the shoes left by Jeordi and Paz are quite large - I'm fortunate to have seen both play for APC. Josh Freese is still drumming away - last time I saw them, though, one of his legs was broken, and he was playing both foot patterns with one leg. Crazy shit...
http://en.wikipedia.org/wiki/A_Perfect_Circle