Hey jvanderb, I have been using the spotify application for sometime for syncing my local files to my iPod... I have already had the 48-hour trial period and I believe that shows up in the account details page on the website!
Hello! This may seem weird but the iPhone/iPod app decided to start syncing all the tracks that I do not own, and allows me to play any song I want. I was listening to my music with the app in the background and it started playing songs that I didn't have as local files. I was confused, switched to the app to find out why and was shocked to find it was working as if I am a premium subscriber. I am not, and have checked my account page on this website and that confirms I am on Spotify Free. Just thought I'd let you know