Ya know, zombies are dead cool...
I'll show myself out.
The writing here is pretty damn good. With just a single paragraph you have outlined what Feldhiem truly is; a gilded hellhole. The adventure hook at the beginning offers a good excuse to shove the players towards Feldhiem. The big star of the show, is the Gilded Undead, or as I like to call it, the shiny zombie. Its a solid example of how you can really add a twist to any mortally challenged locals. Its got a unique gimmick which can be discovered and exploited by players.
I have mixed feelings about the image chosen. On the one hand its a good visual of what Feldhiem would look like, on the other the dark muddy brown does not work well with the starker, brighter colours that surround it. I can't help but wonder if it would have been worth it would have been worth making a black and white (or black and yellow) version of the image via photoshop, GIMP, or whatever image editor you prefer.
Despite this however, I still think Whence the Gold Glitters is solid. You've given us a nice sneak peek into another corner of the wretched world of Mork Borg, and a interesting monster to boot. All in all its a good entry.