1. install unifi, with wheezy provided mongodb (2.0.6)
echo "deb http://www.ubnt.com/downloads/unifi/debian stable ubiquiti" >> /etc/apt/sources.list
apt-key adv --keyserver keyserver.ubuntu.com --recv 06E85760C0A52C50
apt-get update
apt-get install unifi
2. disable mongodb daemon
nano /etc/init.d/mongodb
ENABLE_MONGODB="yes"