it says here: http://www.aperturescience.com/glados@home/
default boot scheduled to finish in 91:43:24
activating emergency distributed computing grid
recruiting cpus to force faster boot sequence
Basically the more time people spend playing the Potato Sack games, the sooner before its April 19 release date Portal 2 will come out.
Playing Potato sack games will boost the reboot process and therby releasing portal 2 before the original release date. For more chart and tracking,
Go to http://cpucount.zapto.org/