ibiblio
Ibiblio: Czeslaw Milosz, Biography
This site from ibiblio.org is a good, comprehensive biography of Czeslaw Milosz. Cites his works at each stage of his life.
Authors Calendar
Author's Calendar: Wislawa Szymborska
Still another brief biography - perhaps because not much is known about her life and she does not like to talk about it. Includes some good thoughts on her work.