How can I play music from my HTC Desire Android phone in my car?
I have something similar to this Parrot handsfree kit that I use for handsfree calls, but primarily for playing music from my Desire through my car stereo (which is of similar vintage).

That approach has the advantage that you can control the music from the handsfree kit, not having to worry about which pocket your phone is in.




  Yeah I'm curious too.. it seems to use Bluetooth. I don't think my car stereo has Bluetooth support 


It does, but it handles all of that. My stereo doesn't have Bluetooth either, but the phone connects to the handsfree kit, which then hands either a mono audio stream (handsfree) or stereo (music) to the stereo's appropriate inputs.