I'd also like to know the answer to this question.

Careers as a Fashion Illustrator
www.careersinfashion.net/fashion-illustrator

Fashion tech start ups are huge these days! Gilt is a good example of a fashion technology gone big!
There's also this new fashion tech start up that I've recently discovered: stylemusee.com
It's totally addicting and really comprehensible.
I think the technological arena of the fashion industry is going to grow bigger and bigger.