I absolutely love the Big Idea. I went to a phone conference here once and it was really awesome. I'm glad they do a lot of social political activism. I can never go into big idea without buying something. They have everything from gender politics to vegan cookbooks to fiction, zines and more! My one complaint is that it seems that when they sell a book, they don't buy a replacement for it, which I understand to an extent, but then if you want them to order in a book it takes a few weeks to a month of two for the books to come in. If you're involved with a punk/subculture/feminist/DIY/anarcho scene this is the place to stop in Pittsburgh. And it's run by volunteers!