While I agree with everything, he left out an important group to thank. It's a pretty important segment, the people who are using your product.
Here's an example of how the exchange could look:
Company: Hey We Launched!
Users: Signup and begin use
Company: Thanks for signing up! Anything we could do better?
Users: X, Y, Z
Company: We've implemented X,Y and are working hard on Z!
This is the sort of post I love HN for. Simple, actionable advice that has a lot of "feel good" results, but also potential upside beyond just the feel good.
Here's an example of how the exchange could look:
Company: Hey We Launched! Users: Signup and begin use Company: Thanks for signing up! Anything we could do better? Users: X, Y, Z Company: We've implemented X,Y and are working hard on Z!