The extension xf86-video-intel.tcz includes graphics-KERNEL-tinycore.tcz as a dependency. I use xf86-video-ati.tcz, but graphics-KERNEL-tinycore.tcz is not listed as a dependency, nor is it as far as I can see, listed as a dependence of the other xf86-video-*.tcz's.
(In some earlier versions I believe graphics-KERNEL-tinycore.tcz was listed as a dependency for xf86-video-ati.tcz.)
In any case, I think a note in either Xorg-7.7.tcz, Xorg-7-7-3d.tcz, or in the individual xf86-video-*.tcz's , INFO file regarding the possible need to load graphics-KERNEL-tinycore.tcz, would be most helpful.