Struggling with a datagrid in flex taking too much memory?
Your datagrid is too slow?
You thought you could just use any component container as an item renderer?

These are the gotcha's of the flex datagrid.

Here are two blog posts by Alex Harui from Adobe that explain how to make sure your datagrid does not get bogged down when creating item renderers.

Thinking About Item Renderers
More Thinking About Item Renderers

He put up source demos, but the source must be downloaded to view.
I have set up the examples with source for you. You can right click any of the examples to browse the source.
Item Renderer Demos

Hope this helps you as much as it helped me.