The reversion list is the waiting list... I got on one last year too for SSHRC, but didn't make it to the top of the list .. as people turn down scholarships because of other funding, they don't accept. Since people can't accept SSHRC and OGS, there are probably a good pool of folks who have their SSHRC and will turn down OGS. By the way, when I went on the list, faculty said its a very good sign (especially for first year doctoral students) - good proposal, too many in the pot.