I downloaded and tried out the latest version of Spring (v1.3). I like the concept, but the process for creating new “objects” seems rather difficult. It would be nice if Spring could automatically make Person objects for entries in the OS X Address Book application. Also, being able to make a visually browseable canvas (similar to what MP3 Voodoo does) of all of your iTunes albums would be neat.
All in all, an interesting product and approach to UI.