Netinstall? I prefer debootstrapping :)Having said that I think it'd be great if Cinnamion is the default DE in Trisquel, just open up a new repository for trisquel (other than edition, edition-updates, and edition-security) and title it belenos-Cinnamon!
As for hardware acceleration I think the question becomes pointless with the existance of Trisquel LXDE.
Or another solution would be MATE+Compiz, but just like in this shot:
