This is great!
It addresses multiple issues that plague designers in their quest to create high quality, functioning websites.
Thank you.

Very inspiring. Good Job!

Well done!

Well done! Really like how you explain the things part by part, as well as you give a small guide how a designer should treat his projects.

Really like it=)

Great work! I hope to implement more of this into my everyday work.

good job, got my like. thank you for sharing.

am i right that you use boinxtv for this?

Absolutely nice and inspiring! Well done. How much I love to see keynote instead of PowerlessPoint …

Well said.

Considerations: I am graphic designer by formation. Worked with interface design in the last 10 years. For the very reason explained here, I gave up and decided about a master focus on product design (Design for Interaction - focus on products). I am now restarting my career and so far I found room to do iterative development with users and clients. Just now, on the product design field. Basically I am facing longer development cycles. Better to ground decisions. When working with web no client was willing to pay for that. I guess that is due to the immaterial aspect of the result. They quite often were expecting you to solve 'the problem' and do not bring 'it' to them (oversimplifying the design brief). I really like the approach shown here, but it most definitely demand a strong 'education' on the client side. Depending on the size of the company you are working on/with that can be troublesome.