For those of you not in the know, Pinterest is the up-and-coming social network where you interact by sharing pictures of desks that you'd like to build or workout routines that you'll never do but like the idea of. It's also a major source of inspiration for the resurgence in home crafting and DIY that's washing over the U.S. Users can share items by repinning them, and can follow brands and users that they love. The opportunity for consumer brands is massive, and Pinterest is looking to capitalize. The company recently started exploring ways to monetize its system, since it currently makes no money -- shocker. But it's helping other companies share their love, and here are three big ones.