The Adidas miCoach system is supposed to guide you through workouts by providing audio feedback as it keeps track of your vital stats. To me, it seems a bit like a Nike+ with more options and an angry coach's shouting.
Like with the Nike+, there's a stride sensor to keep track of your running pace. Additionally, there's a heart rate monitor, and an "audio feedback" unit to aid in keeping track of your workouts. The system will run you between $70 and $140, compared to the $30 or so you'd shell out for a Nike+ kit. We'll compare the two soon, so we'll see whether the price difference is worth it and whether the audio coaching is annoying or useful. [Adidas via Uncrate]