I happened to re-discover this article yesterday(april 17), and I was wondering the same question for about one minute.
Then I realise she meant to stay away from vynyl paste because these contain the nasty products that can poison the skin. The vinyl spackling is the type applied over walls, and a lot of people apply it over their project with their bare hands, without any problem.
You'll find the product under the name "Spackling Compound" where you can buy painting supplies for home decorating.
Artist Gesso is just another name for regular acrylic-based gesso sold in every Art supply store. It just means that the person is refering to professional grade gesso, not the inferior kind.
Traditional gesso, made from whiting and animal glues has totally different properties.
If you are really really new to art supply: gesso is a ground applied over raw canvas to make it tight, scealed and ready to receive paint.
For examples of Spackling compound uses:
I have seen what look like incredible results (though the photos are ridiculously small) on the terrorsyndicate webpage:
http://www.terrorsyndicate.com/Terror_Syndicate_Monster_Mud.html
Come join our paper mache group for more info on paper mache.
http://groups.yahoo.com/group/PaperMacheArt/
We're a happy bunch of overproductive crazy papermashers
I'm the Creturiste, by the way. Don't mind my sometimes off topic postings, it's allowed and inspires.
Enjoy!