CreativePro.com has posted a new tutorial today about how to use Smart Objects in Photoshop CS2.
With CS2, Adobe introduced Smart Objects, special layers that can contain references to vector or raster image data. You treat these layers almost like any other layer, but at any time you can alter the source data for the layer using Camera Raw. Those alterations get passed through to the Smart Object in Photoshop. Because Smart Objects can contain Raw files, they allow for a Raw workflow that lets you re-edit your original Camera Raw settings at any time.