I noticed something the other day. On the swimsuit issue's Wikipedia page, there are already a few models' names listed for the 2013 issue.
I don't know if they are confirmed, or baseless rumors, or wishful thinking, or what. But amid some unsurprising names (and the return of Brooklyn Decker) is one name I hadn't seen before: Natasha Barnard.
A quick search reveals that she was in the recently released South African SI swimsuit issue.