After some playing around I've found that if I change to


INCLUDEPATH += /home/matrim/QtSDK/Maemo/4.6.2/sysroots/fremantle-arm-sysroot-10.2010.19-1-slim/usr/include/telepathy-1.0
LIBS += -ltelepathy-qt4

I can build and run the project as before but now the autocomplete etc works.