MacWorld’s Dan Frakes has posted an excellent screencast previewing the upcoming Default Folder X 4.0. Version 4′s main changes are a new HUD-style look to the interface, and QuickLook attached to Open dialogs (a feature that, interestingly enough, will have limited support for OS 10.4, as well). Tag-happy individuals, however, will likely be most interested in Default Folder X’s ability to apply Spotlight comments to files when you save them. If you’re rolling your own tagging solution, Default Folder X can be an indispensable tool.
But don’t wait until version 4! If you want access to some of Default Folder X’s sweet capabilities now, you’re in luck. St. Clair Software has an upgrade policy that will allow you a free upgrade to version 4 if you buy version 3.0.6 now. Version 3 is fully Leopard compatible (as long as you aren’t running any 64-bit apps); it just lacks the translucency. For more information, and to download Default Folder X 3.0.6, see the Default Folder X website.