Wow, I didn't think this thread would grow so much! It's a bit like a grey hair! 
There's some really interesting posts and I must say even though I am a definite convert to grey, you have strengthened my resovle, thank you all.
Notrightnow and Scuttlebutter great posts, my thoughts exactly.
Diddl,I've been lucky, my dh is an artist and he never liked the hair dye colour anyway (me either, it all comes out the same when it's from a bottle, mine was Bono colour, although I'm sure not as expensive!) it has meant so much to me that he has been really supportive, but show your dh the women on GGLG, some of their stories there have reluctant dh's, in the beginning.
I think we need to change our views about greying, the fact is, it's not about being old, it's about being alive! As so many have mentioned your first grey comes in sometimes when you're still just a teenager, mine started arriving in my mid twenties. I just wish I had actually thought about my options and not bothered dying it, instead I feel the constant stream of advertising we are all surrounded by made my decision for me.
That Chanel model looks amazing by the way, very inspiring,thanks Meglet.
I'm going to track down a link to an article that I found useful when I had just started growing out my hair dye.