I got my Bionic on 9-9. I upgraded from the original Droid, so I am biased to the fact that this phone leaves my old one in the dust when it comes to speed.
However, the first time I listened to music on the thing, I noticed the whine (I have a semi-expensive pair of noise-isolating headphones). The whine was intolerable. After researching around the internet, it seems this is definitely a hardware problem.
I love my phone, but the whine was unacceptable. My workaround? I bought a bluetooth receiver for my headphones. I wanted wireless headphones anyway, and this was a good enough reason to drop fifty dollars on a decent bluetooth receiver.
Long story short, I have no more interference, and my music sounds great once again. I know people are complaining that this is a deal breaker, but there aren't that many great phones out there. And, there definitely isn't a phone that doesn't present some sort of problem. I agree that a phone that was delayed this long should have very few issues (especially an issue as blatant as interference in a headphone jack), but, what are you gonna do about it.
It all depends how much you are willing to pay, and what type of problem you are willing to tolerate.