Seeding for the Knockout stage will be based first on final group position (1st or 2nd), then on your K/D, then RD, then randomisation. This means that that seed #1 will go to whoever came first in their group and had the highest K/D amongst those who came first, and seed #64 will go to whoever came second in their group and had the lowest K/D amongst all those who came second.
A bracket preview can be seen here: http://challonge.com/tournaments/214804/show_print_preview
1st/2nd refers to place in group, 1,2,3,4,5,6 etc. refer to how highly seeded you are within 1sts/2nds.
An up-to-date view of people's seeds so far can be viewed here: https://docs.google.com/spreadsheet/pub?key=0AqUXX_QhaYdVdGdBZFFTcFZWZXdQOEUzS2RZTWFNMEE&output=html
It'll only display people who are guaranteed to be 1st/2nd in their groups, not including people who are just 1st/2nd at the moment.