Feature List:
x) Very lightweight, very fast
x) Can show you invisible files
x) Option: Show QuickLook Previews instead of file icons
x) You can copy entire paths to files by holding down the control button and clicking on an item
x) Sort: Alphabetically, by last used date, by creation date
x) Quickly open folders by holding down shift and clicking on the folder in the Dock

Added in 1.2
x) Show Finder's color labels
x) Show number of items in subfolders
x) Per-Folder settings (hold down option and command and click on the folder)
x) Open QuickLook windows via option-click
x) Set the size of QuickLook Previews