People at Qt labs have worked hard to make Qt Quick development easier, productive and fun for you.  For Qt Creator 2.1 they have the following new features:

• A fancy Quick Editing Toolbar
  The toolbar makes it easier to edit properties like colors, text or gradients.
• A QML JS Debugger
• QML snippets
• QML code refactoring
• The Visual Designer is enabled by default.

They’ve also made it easier to get started with Mobile Development by providing “New Project Wizards”. The Mobile Wizard and the new Qt Quick Application Wizard deploy correctly to both the N900 and Symbian devices and include some boring code for stuff you’ll likely need. There is lots more. Download Here.