A draft of a paper by Hansen et al just out today..
Paleoclimate Implications for Human-Made Climate Change
James E. Hansen and Makiko Sato, January 2011
"... Deglaciation, disintegration of ice sheets, is nonlinear, spurred by amplifying feedbacks. If warming reaches a level that forces deglaciation, the rate of sea level rise will depend on the doubling time for ice sheet mass loss. Gravity satellite data, although too brief to be conclusive, are consistent with a doubling time of 10 years or less, implying the possibility of multi-meter sea level rise this century. "
As I was saying...!