Subject: Will earth rotation be affected by glaciers melting?

Dear mad scientist,

According to the global warming scenario glaciers in the poles are 
partially going to melt, raising the oceans water level. 
That means that a substantial mass will move on earth's surface from the 
poles axes towards the equatorial line.
I deduce that the angular speed of earth must slow down, while keeping the 
angular momentum constant, thus prolonging the duration of the day. 
- Has anyone calculated by how much will the day get longer? 
- Are there any practical implications to this effect?

thanks

Re: Will earth rotation be affected by glaciers melting?