You can track their progress on BaffinRun.com and catch updates via Ray's Twitter Feed and Facebook page. Reports are also being posted to the impossible2Possible Facebook page as well.
While this will be a good challenge for these two ultra-runners, it is merely a warm-up for what lies ahead. Next year they intend to run across the Gobi Desert at it's widest point, an expedition that will cover approximately 2000km (1242 miles) through some of the most remote terrain on Earth. Because of that remote nature of the Gobi, they'll have limited opportunities for resupply which will alter the logistics of the run to a degree.
We'll learn a lot more about the expedition in March of 2013 when Ray and Ferg are expected to set out. You know we'll be following it closely.