This is not so much a question as it is a way for me to provide documentation where there is none.

Requirement:
Must be able to compile an application that uses libtelepathy-qt4 using the Nokia QT SDK on Linux. This will allow compilation for Linux and Maemo using qtcreator.
Yes of course it can be done from within scratchbox with no changes.
But can it be done from outside scratchbox?

Tried the following:
-> Hoped for dumb luck and just attempted to compile. Compilation on x86_64 Ubuntu worked once I installed libtelepathy-qt4-dev. Compilation for maemo5 failed because libtelepathy-qt4.so does not exist in NokiaQtSDK/Maemo/4.6.2/sysroots/fremantle-arm-sysroot-10.2010.19-1-slim/usr/lib
-> Downloaded telepathy-qt4 source tarball from the telepathy website.
-> First time attempting to configure through madde failed with an error stating that I should use --host if I wanted to cross-compile.
-> After reading through config.sub, I figured that the proper host alias should be "armel-linux". Added that and appropriate flags to --prefix and --eprefix.
-> Configure now fails claiming pkg-config not found.
-> Created a shell script to set PKG_CONFIG to the correct path and for completeness, also set up
QTCORE_CFLAGS='-lQtCore' ; export QTCORE_CFLAGS
QTCORE_LIBS='-DQT_SHARED -I/usr/include/QtCore' ; export QTCORE_LIBS
-> After doing all this, configure succeeded and I checked the config.log to ensure that all was well. It seemed like it was.
-> At this point make failed. mad make failed.

Eventually I gave up at this point - and decided to cheat.

tl;dr: Copied the telepathy-qt4 headers and libraries from scratchbox into the Nokia SDK fremantle directories. Now my code that uses telepathy-qt4 compiles for maemo5 and the binary runs flawlessly on the n900.

PS: In my pro file I had to add

unix {
INCLUDEPATH += /usr/include/telepathy-1.0
LIBS += -ltelepathy-qt4
}

to get it to compile for Linux and for Maemo.
****
Edit: These are the steps I took for my Win7 dev vm.

1. Copy
Source: /scratchbox/users/$USERNAME/targets/FREMANTLE_ARMEL/usr/lib
Destination: C:\NokiaQtSDK\Maemo\4.6.2\sysroots\fremantle-arm-sysroot-10.2010.19-1-slim\usr\lib\
File: libtelepathy-qt4.a

2. Copy
Within directory: C:\NokiaQtSDK\Maemo\4.6.2\sysroots\fremantle-arm-sysroot-10.2010.19-1-slim\usr\lib\
libtelepathy-qt4.so.0 to libtelepathy-qt4.so

3. Copy
Source: /scratchbox/users/$USERNAME/targets/FREMANTLE_ARMEL/usr/include
Destination: C:\NokiaQtSDK\Maemo\4.6.2\sysroots\fremantle-arm-sysroot-10.2010.19-1-slim\usr\include
Directory: TelepathyQt4