In, Seth Godin comments on the expectations that sales people have of marketers, plus two that marketers should expect of sales people. Go read it... he makes some really good points.
(No really, go read it.)
(Did you? OK.)
I originally posted a negative screed about sales people but then reconsidered. Seth's points are all excellent. What is the best way that we in product management can help sales people? Answer: deliver better products. Too many product managers are devoting too much of their time to helping individual sales people close deals; too few are focused on helping development create better products. Recognize that selling technology products is hard but selling great technology products is much, much easier. Product managers must understand the life of a sales person and learn to help them. Here's how: help the company deliver better products faster.