I'm trying to install pidgin from the application manager, and these are the repositories i have installed:
Nokia catalog
Nokia catalog (3rd party software)
Nokia System Software Updates
Maemo Garage (new gregale)
Maemo Hackers
Pidgin On Maemo
maemo Extras

deb http://catalogue.tableteer.nokia.com/certified/diablo user
deb http://catalogue.tableteer.nokia.com/non-certified/ diablo user
deb http://catalogue.tableteer.nokia.com/updates/diablo/ ./
deb http://repository.maemo.org/extras/ gregale free non-free
deb http://maemo-hackers.org/apt mistral main
deb http://idefix.go-nix.ca/nix bora pidgin
deb http://repository.maemo.org/extras/ chinook free non-free