Was going to post last night and got tied up. Anyway, just looked. According to the map, there are a grand total of SIX tickets left in the lower bowl. Three in 120 and three in 111 (both in the corner). Again, there's the caveat that I don't know how many tickets will be returned by the schools, but I'm assuming not too many except for maybe Michigan. Cornell usually travels well, and I am certainly hoping that NU and BU sell out.
There are 202 left in the upper bowl...most of which are (in my opinion) not very good seats. All on the ends and/or corners (and having been there dozens of times) and most likely high up - not great vantage points (although some people like sitting there).
Balcony has zero, although as someone mentioned it's possible they aren't selling them there until the lower sections fill up (although if they're not "selling them" by now my guess is they're either completely blocking it off or they are already actually completely sold).
That's the update. Bottom line: if you don't have them by now you're probably not going to get a very good seat. Personally I would love to see the place packed and had a feeling there might be a good crowd for this (which is why I drove down there 2 minutes after the bracket was announced). Now I imagine Sunday will be a completely different story, and if (heaven forbid) it's Cornell/Michigan, you will be able to sit anywhere you want...