On June 15 and 16 of 2012 we celebrated the 100th anniversary of the birth of Alan Turing (June 23, 1912) in San Francisco (http://turing100.acm.org/final_program/tcc_final_program.pdf) with 33 living ACM A.M. Turing Award winners!  It was especially great to see Nicklaus Wirth on the "Programming Languages: Past Achievements and Future Challenges" panel along with Susan Graham, Barbara Liskov and Frances Allen. You can watch the replays of the sessions at http://amturing.acm.org/acm_tcc_webcast...