It occurred to me that Jim Michael wrote in gmane.os.netbsd.devel.pkgsrc.user:
> I have a new install of 3.0 on an Compaq i386 with an NVIDIA video 
> card.  After the initial installation I removed /usr/X6R11/ and 
> installed the Xorg meta-package.  I ran /usr/pkg/xorg/bin/Xorg and X 
> failed to start. 
>
> Any help with this error will be appreciated.  Thank you.

Did you run xorgcfg to configure xorg? If not, please do so.