Here's another little thing I found ages ago that I meant to blog about. I haven't tried Smart Music Studio out but it's description sure is intriguing:
SmartMusic Studio is an interactive, computer-based practice program for woodwind, brass, string and vocal musicians. SmartMusic Studio Intelligent Accompaniment®accompanies you while you practice so it can improve your musical performance in less time by making practicing more fun.
The interesting thing is that it actually changes tempo to follow you; you don't just play along with a recording. It looks slick but since I don't play a monophonic instrument, it's not of any use to me. Would be great for orchestral instruments.