ESA has released the announcement of opportunity for exploitation of Cryosat-2 data. Full details of the announcement and details of how to submit a proposal can be found here. Proposals are due for online submission by 20th February 2009.
Those of you that submitted such a proposal before Cryosat-1 nose-dived into the Arctic do not need to resubmit. You should be contacted and asked for any necessary modifications due to the delay in data availability.
Cryosat-2 is due for launch in 2009 and more information can be found here.