I've been developing Nokia S40 webapps for about 3 months. During this time, I've struggling with how to code in it. Because, there are non existence tutorials on it. Because it's not published at that time.
Now that Nokia decided it's time to open it. I've created new question on SO just for storing tips and trick when developing it (that I find useful).
My request is to mark it as Community Wiki so that more and more people contribute to it. In time, I'm sure it will generate HUGE traffic to SO (particularly from developing country, where S40 is king in those area).