If you have decided to ditch your iPhone in favour of Android, then there is a simple way to take your iTunes music, playlists and album art with you.
Simply go the Android Marketplace and download a Free App called Easy Phone Tunes. You will also need the computer version of the software, so go to http://easyphonetunes.com and download it from there.
Then, when that is done, turn your phone into a USB storage device (this will vary from device to device, but instructions are on the website).
Once your phone is connected to your computer, open the computer version of the software and select your device from the Easy Phone Tunes list. Then follow the instructions to Sync your media.