I know a number of people on DC are already on Pinterest, but is anyone on Springpad?
I just joined springpad yesterday and am finding it a million times better than Pinterest even though they are very similar in many ways.
What I really like about Springboard is that you can share your stuff with everyone, no one, or selected people. So for something like Discusscooking someone could make a Springpad board for recipes and then add DC members who would like to contribute and it would be like our own private collaborative recipe collection.
It is not limited to recipes though. You can use it as a personal organizer. It is kind of hard to explain until you start playing with it and it does take a little more time than Pinterest to set up, but only because it has more options which is a very good thing.
Check it out at Springpad