We present Saltate!, a wireless prototype system to support beginners of ballroom dancing. Saltate! acquires data from force sensors mounted under the dancers' feet, detects steps, and compares their timing to the timing of beats in the music playing. If it detects mistakes, Saltate! emphasizes the beats in the music acoustically to help the dancing couple stay in sync with the music. Keywords Dancing, wearable computing, wireless sensor system, motor skill learning. ACM Classification Keywords C.3 [Special-purpose and application-based systems]: Real-time and embedded systems; H.5.2 [Information Interfaces and Representations ? User Interfaces]: a ? Auditory feedback, p ? Training, help, and documentation.