I got my invite about two days ago. Started uploading and ,boy, is it slow. I only have about 2,000 songs and am only about a quarter the way through. I had a little trouble get the music app working correctly along with the sync, but an uninstallation and a reinstallation of the app seems to have cured that. I now have the music syn option under "accts. and sync". When uploading, it seems my Internet connection seems to slow down, even on my PS3, but perhaps that just has to do with the PS3 store finally being reopened.