It's a wonderful co-op! It's not so much a co-op as a sale offered to a select group... I think the thread title says "special offer.) Dusty (of TexasWaterLily), through Dianne (dbsmith2) posts a lists of plants available at sale prices. You order by emailing or calling Dusty directly, and be sure to mention that you're part of mamajack's co-op on Cubits so you get the great prices. So, while people often have fun posting what they've ordered or discussing different varieties, posting on the thread is not sufficient to place an order -- you have to place the order with TWL, not MamaJ's.
Clear as pond mud?
The prices on these co-ops are really amazing... often half of her retail price, which in turn is a good $10 better than what I can find the same plants for locally at Lilypons.
I "lucked into" half a dozen big containers (plastic, no-hole, 22" across) on clearance last fall, so I'm all set to put some more pocket-ponds into my landscape. I've got several big containers now, a couple of which have been dug partway into the ground which I hope will help provide winter protection for the hardy lotus & hardy WL. So, I'm shopping!