Once you get a valid toolchain downloaded how do you setup QT to point
to the correct mkspec before you import the build (Version)
enviroment. Because when I go into options-qt4 and try to add a new
Version (Build) it says "This QT toolchain has a unknown toolchain."
I think that is because it does not know what qmake.conf file to use
from what mkspecs directory.
Did you source the /usr/local/angstrom/arm/environmentsetup script before starting QT creator?
e.g.
cd appdir
source /usr/local/angstrom/arm/environmentsetup
~/qtsdk2010.04/bin/qtcreator app.pro