The rumor of a (RED) iPhone 3G has been coming and going since for a while now – before the phone had even been made official, even. The rumor died for a while after launch, but alas – it’s back.

According to the guys over at MacBlogz, a red-backed iPhone may be in the works as an easy/cost-effective product revamp for the holiday season.

Seeing as Apple’s had a (RED) tie-in with just about every popular iPod model they’ve released thus far — save the original nano — it’s certainly not too crazy of an idea. Plus, it gives Apple another chance to involve Bono in some way – and Apple hearts Bono.