I managed to get my IBM Thinkpad T41 Radeon Mobility 9000 running Ubuntu Edgy with X.org 7.1 to display on my Sony Bravia 40&rdquot;!
I was trying to get this laptop to support 1360x768 at 60Hz without luck. At first, I was unable to have the open source driver to use this mode and frequency. Later I tried binary driver, but seems it doesn't support Xv, making video playback slow as hell if you want to scale it.
But after some googleing I've found a nice example of using various servers layout on top of the open source driver http://mg.pov.lt/xorg.conf. Then I found how to get the correct mode-line using read-edid (get-edid | parse-edid).
Now it is working perfectly, even with MergedFB option (radeon's own Xinerama implementation), with monitors at different resolutions working together!
Download: http://www.gustavobarbieri.com.br/xorg.conf-wxga_sony_bravia_40