LilyPad Accelerometer Hookup Guide
Gella 
Project Examples
Dungeons and Dragons Dice Gauntlet
The Dungeons and Dragons Dice Gauntlet incorporates a display that will randomly generate numbers between 1 and 4, 6, 8, 10, 12, 20, or 100 in response to arm movement.
Das Blinken Top Hat
The Das Blinken uses the SparkFun Triple Axis Accelerometer Breakout - ADXL335 Breakout Board to control lighting effects on the hat. While not a sewable project, this is a great example of wearable electronics.
Fitness Tracker with SparkFun Photon Wearable Shield
In this video, Creative Technologist Nick Poole uses LilyPad sensors (accelerometer, temperature, and light) with a Particle Photon and Photon Wearable Shield to create a fitness tracker bracer.
Audience Jacket by OCAD's Social Body Lab
The Audience Jacket combines a LilyPad Accelerometer with XBee modules to wirelessly communicate movement data to a computer. When the wearer claps, the movement triggers a cheering sound effect.