David Greiner and everybody at Campaign Monitor are doing a great job, specially promoting the use of web standards for email, and that's why I'm writing this article. We, professional web developers, must work to get email client vendors to fully support standard HTML and CSS in their products.
At 456 Berea St. Roger Johansson has already made the same call and I totally agree with him.
So, what you're waiting for? You can start by helping to define a baseline to support web standards in email.