Al, Jeanie- I am going to go through some old notes and links to see if I can discover the name of that product. It is, more than likely, just a repackaged acrylic medium of some sort. You might even consider going down to a local art supply store and getting a small jar of acrylic medium or Gesso...just thin with water and paint onto the paper. Ideally it will seal the paper just enough to lessen the absorption of ink...results may vary!
Another thing is to try and sample as many types of paper as possible. Some art supply stores will sell you inexpensive packets with all sorts of different papers. It's hard to say which ones will work with inkjet but there can be huge differences in art paper.
Some of those kaleidoscope and watercolor images you have all been doing would look fantastic on a really nice, handmade paper!
Jeanie - Glad you liked that site! That is the kind of stuff I would like to be doing within the next few years. My training is in traditional printmaking (etching, lithography, etc..) and I love the thought of finding ways to combine digital with it. Right now it's fun just to send my work off to a Giclee printer, but I would love to have my own studio to play around in! Once that new Epson printer shows up, I'll at least be able to start experimenting with strange papers. Now if only I can find a gallery willing to display my stuff...