The upper limit has been estimated as about two meters sea level rise by 2100. (dotearth.blogs.nytimes.com)
Well, the experts are very worried about one meter sea level rise over the next century or so. (thinkprogress.org)
More on Greenland: Greenland Ice Sheet Melt Caused By Short - Term Extreme Weather Not Gradual Temperature Rise Greenland Glacier About To Lose Manhattan - Sized Ice Chunk (Video) Two Meter Sea Level Rise Now Inevitable - But How Fast Will It Happen? (treehugger.com)