like every year I checked the term "Wearable" at the exhibitor list at CeBIT 2007. Conclusio: it has not really grown. I found only two companies (beside the fact that I know there are more in the future parc).

1) The Mobile Research Center

"The DemoCenter is a central component of MRC, where information and communication technologies from the field of Mobile and Wearable Computing are presented."
more here: mrc - Mobile Research Center: DemoCenter

2) FIS Fashion Innovation Service GmbH
Product spectrum is "Emerging Technologies - Smart Textiles, Smart Fabrics, Wearable Computing, Wearable Technology"

I will be there on monday whole day and visit for example Urban Tools and hope to find a nice sofa ;-).