The upcoming Leica M9-P camera will be announced on June 21st, 2011 (+/- 1 day based on your location).
Leica Camera and Magnum Photos announced a technological and photographic collaboration earlier this year. See also the related video “Leica & Magnum: Past Present Future“.
A new 21mm f/3.8 lens plus a M8/9 firmware update are also expected to be announced on that date. Some more Leica M9-P details: