I emailed Underoath's manager, and this is what I got back:
"Thanks for the email, we are very aware and excited about this new development. We are patiently waiting on details from HMX to find out how we create these tracks for them and will certainly be participating once they give artists the info."
I also emailed Anberlin about RBN and this is what they said:
"Its being worked on brutha!"
I don't know what thats supposed to mean, but hopefully they are interested!