After a successful public beta, TLA Systems today announced the immediate release of DragThing 5.7, a significant update to their alternative dock application. The main new feature of this release is support for dock themes — a simple way to make your DragThing docks look great. It does away with all the trial and error from previous versions — you can now just pick from a range of styles in a single place. As well as dock themes, there are many other improvements and fixes, including the ability to highlight any Rosetta applications in your docks and new, fast AppleScript support. DragThing is priced at US$29.