BodyMedia | Core 2 - Armband that tracks heart rate in addition to steps, distance, stairs, calories and sleep. I'm getting this when they release it later in the year. It tracks calories better than other devices and will be waterproof!
Withings challenges Fitbit with Bluetooth Activity Tracker and Star Trek-inspired scale
#Quantified - Withings | Smart Body Analyzer - Withings' new wireless scale can track not only weight and body fat, but also heart rate, ambient temperature and ambient CO2 levels. It syncs via WiFi, Bluetooth and Bluetooth 4.0
Masimo | iSpO2 - Finger pulse oximeter that tracks your blood oxygen, pulse rate and perfusion index readings. Recommended for aviators, mountain climbers, athletes and patients with heart or breathing problems. #Quantified