Here's also some applications using PyQt (looking at the dependencies):

silencer
nclock
pypianobar
maelophone
maesynth
healthcheck
wifieye
gonvert
qlister
ansela
autocompleteeditor
ncalc
pysafe
ejpi
maemoney
maegirls
dreamremote
peqersi
autofreewifi
pebble-do
kfzcheck
web2sms
smscon-editor
tvcplayer
scribo
netstory
pyradio
sleepanalyser
maamp
shiprolling
www2sms
swappolube
gargoylelauncher
khweeteur
cutetube