Features vs Buttons Graph from Balsamiq
balsamiq.wpengine.netdna-cdn.com
"When it comes to wireframe the first comer has a huge advantage and all the fans create a huge wall for the late comers. I wonder how long the fans are going to resist MockupTiger? Once you use it you will fall in love!"
"Google plus mockup/wireframe http://www.mockuptiger.com/google-plus-mockup-hand-drawn-vs-...
Image is from their manifesto at http://balsamiq.com/products/mockups/manifesto#vision