Via an article on the Southgate ARC site, I noticed that the UK Six Metre Group had published a commentary on the new bandplan for 50MHz as agreed at the IARU Region 1 conference held in August 2011 in Sun City, South Africa.
The main new feature of the bandplan is that the majority of beacons will move from the lower portion of the band to the segment between 50.400 and 50.500, although synchronised beacons will share a segment from 50.000 to 50.030. Also, the new CW segment sees a 'Future International Calling' frequency at 50.050 and an Intercontinental Calling frequency at 50.090.
EME has a segment from 50.310 to 50.320 and MS from 50.320 to 50.380
A WSPR frequency is established at 50.401 plus or minus 500Hz with a beacon exclusive band from there to 50.500.
Digital Voice gets a mention in the top section of the band for the first time.
The new bandplan is set to take effect from 1st January 2012, although beacons have until the end of 2014 to move. See the bandplan here