A page that is making it’s way around the internal webernets is a multi-part series by Miso Engineering: Asynchronous Processing in Web Applications, Part 1: A Database Is Not a Queue. The article is an interesting read for those starting to expand their web application horizons.
This article as with many others, I am sure I will post addresses what I feel is a very common problem among programmers: using the right technology for the job. I am certainly among this collection of programers who knows, technology A, and knows that A can address problem B. In this case it might be PostgreSQL and acting as a message queue. However, I really need to sit back and think more about the overall architecture to see learning or implementing a new system might be the better option.