As requested, here's the latest. With only 7 games left in the year, there are only 128 possible combinations of outcomes left, and even the most unlikely is only a 1-in-8000 shot, so the simulation should be capturing everything many times.
Some interesting stuff going on this year. MSU is probably going to get the 2 seed since Pomeroy gives them a 91% chance to beat OSU, but if they don't they could fall as far as the 7 in a 4, 5, or 6 way tie scenario. Meanwhile, Maryland only has an outside shot at the 2, but it looks like they're guaranteed a top 4 seed and a double-bye. PSU would also seem to have more motivation than us on Sunday - if they win, they're guaranteed to avoid a Wednesday game, whereas we're just determining whether we open against Minny or Rutgers.
The tiebreaker chart complements what we can see from the seeding breakdown. If tiebreakers were just coin tosses (or anything arbitrary), the 2-7 seeds would all be totally up for grabs between six teams, and Michigan could range from 5th to 8th seed as well. I'm doing back of the envelope math here but I come up with a number of possible seeding combinations for the 2-8 that's between 864 and 2800. However, due to the particular B1G tiebreaking procedure, the actual number of combinations is less than that (a number I won't even try to come up with right now).
It's easier to see what that looks like in the 9-12 seeds. There are 4 teams and they all play each other (IL @ PSU and Neb. @ NW), so there are only 4 possible sets of final records to compare.
Winners ----- Final order, ties indicated ---- Possible outcomes with arbitrary tiebreaker
IL/Neb. ------ Neb>NW (T), IL>PSU (T) ---- 4
IL/NW ------- NW, Neb, IL>PSU (T) -------- 2 (both duplicates from previous line)
PSU/Neb. --- PSU>Neb>NW (T), IL ------- 6 (2 duplicates from line 1 w/PSU third)
PSU/NW ---- NW, PSU, Neb, IL ----------- 1 (duplicate from previous line)
That means there are 4 potential orderings in reality, but 8 potential orderings if tiebreakers are varied. At the start of the season, you'd think every possible ordering of the final standings (14!, or ~87 billion) would be in play even with a particular tiebreaking procedure chosen, so somewhere during the season enough results are set that the tiebreaker starts to restrict the potential outcomes. With all the data I've pulled down at various points this season (much more than I've processed and posted) it might be possible to identify a point in the season where that happens.