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Just logged in at 11AM Central Time, all I can say is, if you want seats this year, this is BY FAR your best opportunity since 2006. I actually switched my seats and "upgraded" to lower cost seats that have great views.
I can't log back in because I bought my seats, but there were seats available in I would say 3/4th of the sections (Most sections in the Terrace, many sections of the Lodge and just about every Plaza Section) of the stadium except the lowest level of the Terrace, the Lower Box, those were all taken.
EDIT:
I was able to log back in, tickets available in every section of the Plaza, every section of the Terrace except 614 and 629, a couple of single seats in Upper Box sideline, and about half of the Loge Endzone sections.
Very helpful... But makes me even more bummed out that my Select a seat time isn't for over a week from now.. I'm sure there'll be pretty slim pickings by then. :-(