Another update:
Hourglass didn't advance to the third round. The judges and crowd were more into some other band that I was personally unimpressed with, but then these Band Battle thingies are really just popularity contests. Prog Metal is considered passe by many in the younger set, so Hourglass was doomed from the start.
Nonetheless, they still played awesomely (again), and even did an excellent cover of Dust In The Wind (not Dustin in the wind - we saw that at ProgPower) by Kansas. Brick (the Hourglass guitarist) even got onstage with the last band that played and jammed for a bit, and Trevor (KatV) was very impressed with his improvisational skills and skill as a guitarist in general...
I can't wait to see these guys play again - and hopefully they get to play a longer set next time. Four songs is all they had time for after getting all of their gear onstage, although one of those songs was at least 10 minutes long!
Great job Hourglass guys!