What skills should a product manager have

I wonder if this list should really be targetted at a good product manager. I'd say a good CEO, COO, CTO, CIO, and programmer should follow the exact same rules. These are the things that are important to a business.

Some might say "why does a programmer need to be involved in things like design, forecasting, prioritizing, etc. etc. I'd say it's because it helps them understand what they are building and why, and can therefore help them have the greatest impact on the business.