I don't know which ones do for certain. I'd guess Snort and Iris since nostr:nprofile1qqsx8lnrrrw9skpulctgzruxm5y7rzlaw64tcf9qpqww9pt0xvzsfmgpr9mhxue69uhhyetvv9ujuumwdae8gtnnda3kjctv9uq35amnwvaz7tms09exzmtfvshxv6tpw34xze3wvdhk6tcpg3mhxw309aekk7n6dcmxx6tdvej8vdt9xfcxs6nrx3uhydtkxa5kkcncw3hr2e3hv34hwm34vvmhvdphw3j827nvvfhhxutdw9jzummwd9hkutcm77dqn updated the spec? He'll need to confirm. Zap.stream does too? Amethyst now has support for it. 

 Does it have to be configured by someone who understands it or does it “just work”? 

 Configuration is required 😬 

 Second time I get to use this today! https://image.nostr.build/889e64d7200e434ed915738c6c25b88f0873f1d82198bd2894e823988a770bb7.jpg  

 You select which servers you want to use in Settings, then select NIP96 as your uploaded in preferences, automatic fallback is not yet supported though