I joined Ravelry several days ago and I am happy there. So many wonderful projects and a lot of pictures.
It has only one disadvantage: you can spend hours admiring projects in Ravelry, while your own projects lie in box or bag untouched.
You can put your unfinished projects and show your progress.
It has connection to your blog on blogspot.com, what you write here, it will appear in ravelry.
You can make friends from all world.
You can put to favourites inspirational pictures of other crafters.
I am sure, that there is a lot of more great features, I look forward to diccover them.
BTW. my nick is rupr, if you want to meet me.