To get the native screen resolution of 1440x900 I downloaded the 915resolution hack directly from its developer page as a Debian package (the Ubuntu package for Breezy was outdated and didn't support the latest Intel chipset. I then installed it with:
dpkg -i 915resolution_0.5-2_i386.deb
and put this line in /etc/init.d/bootmisc.sh
/usr/sbin/915resolution 3c 1440 900
in this way the 915resolution hack is called every time the system boots up, and I'm able to get the native resolution.
http://xoomer.alice.it/sam_psy/soft/ubuntu_install.html
🙂