I did it. I bought a Gore sealed road derailleur kit, then realized it didn't have enough nosed ferrules or grub seals for all the cable stops on my Rocklobster. I dug through my 'cables & housings' box and found some old nosed ferrules from mtn bike cable kits, as well as some cable liner. Both are larger diameter than the gore stuff, but coupled with heat shrink tubing and a heat gun I had a fully sealed system. Since then I bought a jar of SRAM (Jagwire) nosed ferrules and also enough shimano cable liner to make my own sealed systems. Only thing the Gore kit has that I don't is the plastic (teflon?) sheath on the cable itself.
My ego compels me to tell you that this was before the cxmagazine article came out. :)