I'm using CocoaLibSpotify, and it works great. But when the login window comes up, every time I login with my account I see the "Get Spotify!" message afterward, encouraging me to upgrade from a trial account (I have a premium account). Is this just because I don't have the Spotify app installed? (I live in Canada, so it's not available to me). If so, the wording is slightly confusing.
Yes, it's because you don't have the Spotify client installed. The wording will be fixed soon.