This was a quick proof of concept project I made. I know btsync isn't open source, but the API they expose it simple and I should be able to drop in an open source clone if one is made.
I was also thinking it would be cool to make a sandbox with docker and allow webpages to execute code within those. It would be cool to explore what is possible while keeping everything as decentralized as possible.
Wow, I'm not sure which I'm more impressed by - the fact that you actually went and built a prototype distributed-internet browser (an application these sorts of services keep alluding to, without one actually existing), or that it only took a couple-hundred LOC!