Hi there, I tried to push my laptop (MacBook) to it limits with the NVidia card, by upgrading the NVidia drivers. So I can say: running OpenSolaris 2009.06 up to 1920x1080x24 on an external display is possible :)
Procedure on how to set it up is here: http://wikis.sun.com/display/chosug/Dual+Screen+With+NVidia+and+OpenSolaris+2009.06 Cheers Karim
