I asked some of my friends today, a very few of them knew about Flicker. The photo sharing and managing service which was bought by Yahoo! recently which is now hugely popular. You can use your Yahoo! ID to surf through it.
It Offers a very nice range of tools, like
- RSS ,
- Integration to blogs like wordpress,
- upload by mail

and many more..

I’ll be glad have some friends there . http://www.flickr.com/people/sreejith/