Rolling Stone magazine has an update on CBGB, which wrapped filming in August. The article states the film is currently in post-production and is expected to clock in around 100 minutes. Read the article here.
There is also some more information about Rupert Grint's portrayal of punk guitarist, Cheetah Chrome:
Things immediately clicked between actor Rupert Grint of Harry Potter fame and guitarist Cheetah Chrome of the Dead Boys, whom the young actor portrays. Though Grint's English accent initially worried him, Chrome, who has a seven-year-old son and has seen every Harry Potter movie, says his only advice to Grint was to mumble a lot.
"The first day I saw him on-set, he hit it dead-on," Chrome told Rolling Stone. "He had me down. I'm really glad he's doing me." Chrome himself wasn't left out of the film: he has a cameo as a cranky cab driver who hates punk music.