This is a rather long post that walks through creating a ColdFusion service CFC and a Flex class to communicate with it using test-driven development tools.

Test-driven development: at first, it seemed like a lot of overhead. However, now that I've been doing it for a year and on multiple projects, I can't get enough. Believe it or not, you will get things done faster. Even better, I'm now more confident in my code, and I think it's made me an overall better developer.

However, I haven't been all that good about TDD on the Flex side of things. I'm stopping that now, and I'm going to use CFCUnit + FlexUnit to test everything from my lowest level DAO in ColdFusion to my client-side classes in AS3.