Thanks for the great mockup! We're certainly looking forward to providing more flexibility and customization around Get Satisfaction activities. Your suggestion is well received :)
The four categories (Q, I, P, P) are sufficient and very usable, I must agree. However, there are a few who have topics that either do not fit under any of these categories or would like to emphasize the specificity of their own topic. I would like to see a fifth tab, below Praise, with a text box and hopefully a customizable logo as well (or a general user-defined logo might be more orderly).