Perhaps you're right Poeticlaw, but I'm just going by what the Yahoo! scenario generator told me. It's possible that Yahoo! isn't taking into account the various tiebreakers that exist behind head-to-head, division and conference record.
Can Buffalo win the #6 seed at 8-8? Let's see. The Bills cannot pass the Broncos, the current #5 seed (8-5) because of the conference record tiebreaker.
Should Buffalo win out and be 8-8:
Jacksonville, the current 6 seed (7-6), could lose out and be 7-9. But that would require a loss to Cleveland.
Baltimore, at 7 (7-6), could lose out and be 7-9. But that would require a loss to the JaMarcus Russell-led Oakland Raiders.
Baltimore and Pittsburgh, at 10 (6-7) can not both lose out because they play each other. If Baltimore wins, they would have eight wins and would have Buffalo on the conference record tiebreaker. If Baltimore wins that game, Buffalo would be out.
Pittsburgh would then have seven wins and play at Miami, the current 8 seed (7-6), in the last week. One of those teams, with a win, would go to eight wins. However, Buffalo's conference record would be better than Pittsburgh's, so the Bills would win that tiebreaker.
Basically, if you want a Wild Card, cheer for Pittsburgh to lose this week vs. Green Bay and then beat Baltimore and Miami.
Now, Miami, at 8 (7-6) plays Tennessee, Houston and Pittsburgh, two of which the Bills would lose direct tiebreakers with due to head-to-head losses. Miami could lose out but that means that all three of those teams would have seven wins.
New York, at 9 (7-6), could lose out and be 7-9. Actually, I see this to be a distinct possibility.
Pittsburgh, at 10 (6-7), has been discussed. The Bills would want them to finish 8-8 in order to wipe away two teams Buffalo wouldn't win the tiebreaker against - Baltimore and Miami.
Tennessee, at 11 (6-7), has also been discussed. The Bills need them to finish at 7-9 or worse, but they would have to beat Miami.
Houston, at 12 (6-7), has also been discussed. The Bills need them to finish at 7-9 or worse, but they would have to beat Miami.
Then is Buffalo, at 13 (5-8). Win out and hope a lot of dominoes fall your way in the last three weeks. One loss, however, and this entire time I spent at work diagnosing all this goes to the hounds.
There's always next year, right Cubs fans?