Just down to chin length atm. Ive been going grey for years, and after wrecking my hair with bleach decided to shave it short (this was about 8years ago). Perfect time to grow out the colour you'd think? Couldn't find a grey hair for love nor money 
There are some nice pictures on the 'How old is too old for long hair' thread.
I imagine I'll grow it out and it will be silky and silver, it would probably be grey and dry 