Define “ours“. “Tweetspace” is only Twitter? Perhaps not all of those at once…
The education space definitely. Many are still in the “old” blogosphere. They use phrases/hashtags like “Domain of One’s Own” (#DoOO), personal learning networks (#pln), #EdTech, #EthicalEdTech, etc.
Maybe a dash of #OpenScience, along with maybe @LibCarpentry and @theCarpentries?
#IndieWeb is platform interoperability, along with a smattering of the others but you already knew of that overlap.