Yes! It's true!
We're in the process of getting Glide on RBN 2.0. ...Huh? English please!
Basically, a newer version of Rock Band Network (compatible with RB3) is being released that will have new features, such as vocal harmonies. Anyway, we're hoping that the song passes the testing phase so that you'll be able to download, play, and sing "Glide" with your friends at your next Rock Band 3 party!