For the San Francisco production, the official site still has not been updated; however:
On March 30, 2010 – Felicia Ricci has replaced Carrie Manolakos as standby for Elphaba. Alyssa Fox has replaced Felicia Ricci in the ensemble and as the understudy for Elphaba.
For the 2nd National Touring Production:
On April 6, 2010 – Vicki Noon has replaced Marcie Dodd as Elphaba.