I had looked at I2P for this project previously but ruled it out due to it not behaving as a data store (which Freenet and TomP2P both are). Looking at the I2P documentation again, they did mention someone adding Tahoe-LAFS support (https://geti2p.net/en/comparison/freenet), but I don't have any information about that.
I also looked at I2P before I knew about TomP2P. Since I2P supports both TCP and UDP (https://geti2p.net/en/comparison/tor), it may be possible to combine it with TomP2P. AFAIK, Tor does not support UDP so TomP2P + Tor is not possible.
I just saw this: https://geti2p.net/en/docs/applications/supported#decentralized-file-storage (though i can't view eepsites right now since i don't have I2P installed). I2P definitely goes back on my investigation list.
