We are publishing a set of three articles (excerpts from our book) in ColdFusion magazine (October, November and December) on advanced DataGrid techniques. Let the name of the magazine not mislead you - thes articles are written for all Flex developers, regardless of what has server-side technology they use. Here is the url to all code samples from these articles:
Please note that source is available on the first page only. Also, was deploying in the rush - with debugging player you might see message boxes asking for debugger - just cancel them.