I use my own tool, mdSync. It's on my site (PC only, requires USB connection). The one on there currently is BB only, but my development version does Android too. I'm going to add a feature to automatically add any amazon MP3s on your Android to your local iTunes library when you sync. The star-rating is BB only at this point.
After I started using Google Listen for podcasts and the amazon MP3 store, I have not had any need to sync, however.
By the way, my tool is free and open source. Let me know if your would be interested in an Android version and I'll speed up the work getting it available.