I came across this blog while surfing. "The focus is primarily on typical winter hardy cacti like Opuntia, Cylindropuntia, Sclerocactus, etc -" but there is some "experiments with e.g Lophophora and Epithelantha." Unfortunately the blogger doesn't have many posts archived and the blog doesn't allow for non blogger members to comment so there doesn't seem to be much of an exchange. But it may be of some use to gardeners who would like to experiment with Cacti in their gardens.
Maybe if the blogger notices this post linking to his blog he'll change his comments to allow anonymous comments and switch on the word verification feature which prohibits spammers from spamming his blog and allows him to communicate with visitors to his blog.
Click the post title to see the blog.