This following post is incorrect because I misread the main graph (h/t to Mike Aucott for pointing this out). I have left it here for the historical record, but you should read this one instead.
Rignot et al (who's work I have discussed in the past) have a new paper out with an evaluation of the mass balance of the Greenland and Antarctic ice sheets. I can't find the full paper online, but the press release has the key data:
This corresponds to a contribution of 1.3mm/yr of sea level rise. Importantly, at least so far, this isn't showing signs of rapid acceleration (there's noise, but no obvious sign of systematic departure from a linear trend in that data). Gavin Schmidt at Real Climate notes that this contribution to sea level rise is consistent with the semi-empirical estimates of Rahmstorf and collaborators (here and here).
The key figure from the second of those papers was this one:
It seems to me that the science of sea level rise is starting to settle down a little bit from the enormous kick given to it by Zwally's discovery of the importance of basal ice sheet melting. Sea level rise is going to be more than the IPCC AR4 projected, but still, I have trouble seeing 1m over the course of this century as a serious threat to global civilization. It will certainly be a very expensive regional problem, requiring lots of engineering works in coastal cities, loss of certain ecosystems, damage to coastal property. But I have trouble seeing us not being able to adapt to this, or it causing us to seriously change our ways. The biggest potential threats from climate change would seem to be elsewhere.