I'm just starting to install the Shopp plugin on my test site http://www.shepherdjim.com/ and would love to see it in action on other Atahualpa sites.
And, of course, it'll be helpful to hear of any troubles and tricks anyone wanted to take the time to share with the rest of us.
The e-commerec shopping cart installation at http://www.shepherdjim.com/ is not active so you can feel free to fool around by making "purchases" and such.
Jim