So I've been living in Sao Paulo for almost 8 months now and have just discovered Total SP!!
I found their guide book in Anna's bookshelf and read it front to back in one sitting. It's a great little guide for Sao Paulo - if you're moving here, or if you're just coming for a weekend visit (though you'd need more than a weekend to check out all their recommendations). I've already picked up 3 of them - a copy for ourselves (I think Anna would notice if we had stolen hers) and a couple as cute little presents.
I had to hunt them down - Livraria Cultura, supposedly the biggest bookshop in Brazil, didn't have a copy but I found them in a little boutique bookshop off Oscar Friere. The shopkeeper asked me if I knew the authors as he knew them personally himself. I like that they are a little more homegrown than your Lonely Planets or Rough Guides. All our weekends in Sao Paulo 2011 are already planned!
They also have an online guide with updates.