Okay so for control and power here is what I am looking at:
For the vibration motors they will take between 2 and 5V with higher voltages causing more vibration. About 3 to 4 volts will work for my purposes. This will draw about 100 mA.
For the Peltier coolers, from my experimentation it seems like 5V @ 1.5 A will be sufficient. However, they will need to be controlled so that they provide steady cooling and then heating when needed for alerts. I am thinking it will not be as simple as turning it on and off or even using PWM. Based on the discussion hereit seems like I don't want to have it turn on and off using a thermostat like device because that is inefficient and causes thermal cycling. They also say that PWM signals will make it work less efficiently.
For the first version of control, I am thinking of using my Arduino along with the adafruit motorshield to control the peltier coolers. I will add in some capacitors to build a simple LRC circult to smooth out the PWM signals. As for the on/off vibration motor control, I'll just use some digital pins attached to transistors for switching.