The biggest issue relating to sea level rise isn't the melting of the land based glaciers, its the thermal expansion of the existing liquid oceans. As previously pointed out there just isn't that much ice on the land mass to cause these supposedly catastrophic changes in sea level.
Also, what may of the AGW alarmists gloss over if they even mention it at all is that the rise in sea level is, even in the worst case of the actually plausable scenarios, measured in perhaps as much as 1 meter per century. That's 3/8" per year. That would not make it all that hard to deal with relocating affected populations to higher ground.
Under most plausable scenarios the rate is significantly slower that that, more like 1/10" inch or less per year.
Of course, the reality is that sea level has been flat or slightly declining for the last several years. Any rise that had been seen appears to be most likely due to the same natural cycle that's led to the higher temps of the early and late 20th century, and the cooler temps of the 60's and 70's, and the apparent trend towards cooler temps going on now.
As to the Greenland ice, from what I've read, even if the glaciers are currently retreating their mass is actually increasing. IOW, whatever extra is being lost due to calving at the face is being more than made up for with extra snow fall farther inland. The retreating face being due more to local wind, ocean current, or other micro-climate effects than any change in global temperatures.
