The net rise of ocean level is tiny and possibly none.

According to the 2007 IPCC report, the Antarctic is expected to lower sea levels over the next century. Increased temperature leads to increased precipitation over the Antarctic, which will freeze and accumulate as ice because the Antarctic will remain below freezing. This lowering will not overcome the sea level rise caused by thermal expansion and other sources of melted ice.

See chapter 10, section 10.6.4.1:

http://www.ipcc-wg2.org/index.html