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Interesting. Last time I checked on that project personal chains were theoretical. Glad to hear they made progress. Having said that, I think they would still have problems. Can users stream videos from the blockchain? If so, how is the bandwidth paid for? Another difference is that Bitcloud can potentially be used to bootstrap a brand new mesh network with profit incentive in the future. "Mining" bandwidth instead of storing meta data in the blockchain seems like a better option.

Yes, you are right - dev has said that personal blockchains are at concept stage and will take months to work on. What excites us however is that he constantly delivers the code that he talks about - so I am really looking forward to the personal blockchains.

I am not sure about videos but pictures have been uploaded into Datacoin blockchain.

https://krypte.net/dtc/txid/a2784925fe6a147c85ed8a4694d4f3e8f616141d7c7dc548b70e3d8f25a651fb

(You must register on the site to access the picture)

The idea of a meshnet has been discussed in threads but not by dev - idea in threads is that Datacoin + Namecoin could be used to make a meshnet, with nodes connected directly by Wifi. But there is no code - just an idea.