Conductive thread is a creative way to connect various electronics onto clothing. This thread can carry current for power and signals. While not as conductive as traces on a printed circuit board (PCB), this thread makes wearable clothing 'wearable'! This is a plated silver type thread (as opposed to stainless steel). This is a finer thread that can be used in standard sewing machines. Resistance is about 300 Ohms per foot. Spool contains 1 oz of thread, about 150 yards.
Full article: http://www.sparkfun.com/products/8544#