qmlviewer is packaged inqt4-qmlviewer.
The browser app still doesn't start from qtdemo.
I'm getting the following error when I run
$ qmlviewer /usr/lib/qt4/demos/declarative/webbrowser/webbrowser.qml
file:///usr/lib/qt4/demos/declarative/webbrowser/webbrowser.qml:43:1: module "QtWebKit" is not installed
import QtWebKit 1.0
^
Philip