Good news and bad news today for YouTube, the viral video sensation -- First, the company reached an agreement with Warner Music to share revenue for broadcasting video of Warner artists like Radiohead and Missy Elliott. But it's been threatened with a lawsuit from Universal Music Group if it can't reach a similar agreement by next week.

Is copyright evolving here, with traditional copyright enforcers (i.e. "record" companies) joining forces with emerging online media outlets for mutual profit? Or does YouTube not have a choice but to comply with Warner and Universal, or be sued out of existence (a la Napster)? Then again, why shouldn't Universal sue -- YouTube duplicates and distributes their copyrighted material to millions of viewers every day, with limited copyright enforcement on their users. What's the best solution?