Oops, I misspoke.. if Tiger doesn't have A2DP (there's so many profiles it's hard to keep them all straight), developers have already confirmed Leopard does—so the code is there anyway.
The iPhone has many design cues taken directly from Leopard (see Apple's Mail and Calendar apps)—so I'm sure the iPhone is based partly on Leopard... and probably more of Apple's secret underground laboratory/iPod resources.
Apple has never been really keen on copy management systems... so I doubt this will be in the implementation.