The Advanced Arduino Starter Kit has been mostly fun but a little maddening as well. There is no documentation on the components included in the kit and there are a number of parts I'm still trying to track down specs on. Here's what I've got and/or figured out so far (update: I finally did track down some specs on the less common parts):

Piezo buzzer

HXD
Rated voltage: 5V
Operating voltage: 4-7V
Rated current: <28mA
Sound output: >85dB
Resonant frequency: 2300 +/- 300

Tilt Sensor

Yaxiya Sw-200
Max switch rating: <6mA/24VDC
Electrical life endurance: >50,000 cycles
Contact resistance: 2 Ohm
Differential angle: 30 degrees max

RGB LED

Common anode

Thermistor

MF52 4300
Rated resistance: 20-1000
B value: 4300
Rated power: <=40 mw
Dissi. coef.: >= 2.0
Thermal time constant: <= 7

Mini DC Motor

Nominal voltage: 1.3 VDC
Starting voltage: 0.6 VDC
Current (avg): 30 mA
Current (max): 35 mA
Normal speed: 16000 rpm
Starting current: <150 mA
Armature resistance: 7 Ohm

Vibration Motor

(This is the small pager motor with the vibrating counter weight)

Rated voltage: 3 VDC
Operating voltage 2.2-3.6 VDC

Photoresistor

PGM5537
Max voltage: 150 VDC
Max power: 100 mW
Spectral peak: 540nm
Photo resistance: 16k-50k Ohm
Dark resistance (min): 2M Ohm

Making Things Talk Book

One note about the book included in this kit (Making Things Talk): it is a good book but will seem rather out of place in this kit as the majority of the parts you need to build the projects in the book are not included in the kit. It's more of a cookbook for projects beyond what you can do with basic/individual components and is heavily focused on networking and more advanced communications / sensing. If you're expecting the included book to guide you through using the included components, you'll most likely be disappointed as the projects range from intermediate to advanced and require different components than this kit includes.