Although the announcement of the new black jerseys is coming so close to the game, it looks like the Student Government Association is pushing for wearing black in the stands for a "blackout".  It is kind of buried towards the bottom of this article:
http://www.collegiatetimes.com/stories/15758/combat-ready-virginia-tech-to-wear-special-jerseys-against-boise-state

Hopefully the word will get out to everybody to make it effective.  University Bookstore is selling SGA black Ut Prosim t-shirts.