No equivalent as far as I know but would love to see one. The function it served has been scattered across Youtube, X, Substack, Hacker News, etc. but scale makes it hard to curate exclusively for such a specific audience with such a specific aesthetic.
Kevin Kelly is still writing through The Technium [0], which might scratch some of the itch but is more an island than a colony like Whole Earth was.
I mailed off for so much weird stuff from WEC ... stuff I'd never known about before ... from all over the hemisphere. Unusual teas and bakeries, kinnikinnick, oddish books, even some chair-caning materials (used on one VERY old chair). Sometimes forgotten about because of "Please allow 3 to 6 weeks for delivery."
Well, I had short hair during the 60s and 70s. I have had a ponytail since I hit double nickels (if you don't understand that phrase, get off my lawn). So yeah, hippy!