Not sure if anyone has tried this, but for a recent school project I experimented with using wire wrap wires (or any 30AWG or thinner wires) for 'sewing' electronic components to fabric or clothes. Well, it's not exactly sewing, because it's more like weaving wires through the fabric, and soldering components onto the wires. Also, it doesn't really involve a sewing needle because the wire itself is good enough to penetrate through fabric. I like the solderability, because I am really not good at sewing. Also, these wires are available in many stores and are cheap. I've documented the process (with pictures) in this blog article: http://rayshobby.net/blog/?p=1128. If anyone has tried this, please feel free to share your experience.