Be sure to checkout the 6 new samples in the Flex Box category.
Ted Patrick wrote great Custom Preloader samples to demonstrate how to make custom preloaders using SWF, PNG or GIF files.
Also included are 4 more great samples from Ely Greenfield (Dashed Lines, Data Based Renderers and Data Drawing Canvas).
Derrick Grigg submitted a sample highlighting how to enable drag and drop within a DataGrid.