I'm wondering if anyone has any experience with Smart Music... www.smartmusic.com/ I just got my CD in the mail last week, and so far I am having a blast. You download whatever song you want an accompaniment to, plug in your mic and the program actually adjust tempo and style to match your playing. The music library is huge for all instruments. There is also a "student" mode that will grade your playing on timing and being in tune. Pretty fun stuff and great if you do the majority of your playing alone, like me! If any of you have used it I would love to hear what you think of it!