If you don't know what Pinterest is: For an example of a Pinterest board here is mine: http://pinterest.com/techgeekcasey/ Does anyone else use it? If so do you like it or dislike it? Membership is currently available by being invited by a current member or requesting a invitation on the Pinterest website, so if you would like to join let me know and I can send you an invite.
It's awesome, I use it a lot. It's like a dedicated Tumblr for images BTW, you can join without an invite. Just go to the login page and sign in with your Facebook or Twitter account, no invite needed.
It's become very popular but I only see business people using it. I like iy but don't really think about posting so my account's pretty empty.
The Pinterest concept is very interesting. I managed to get an invite from their website, and i'm still experimenting with it. If someone needs an invite - let me know.
I registered on the big P few days ago, and i'm still exploring it. It has it's own way of functioning, different that the Facebook or Twitter, and i like that. Also, i like the content people are posting there.