Looks like the link to the original article no longer works. I couldn't find it via the wayback machine, either. BUT, I did find an old blogpost by R Ranson about making a rye nettlesourdough bread, so maybe it's the same basic recipe!
I've got this rising on my bench/counter. I put mine in a tin as I want square slices this time. It looks good and felt good as I was kneading it so I'm looking forward to the final result when I cook it this evening.
Common Weeds And Wild Edibles Of The World (HD video)