Implement reinsert on demand
Provide a "reinsert on demand" feature, similar to FreemulET implementation, but as a standard feature.
This would improve sharing of large files, and would make sharing of rarely requested files more reliable.
There are doubts whether on-demand reinsert poses some anonymity risks, but individual user may be given an option whether to enable it or not, whether to always reinsert complete file or individual blocks etc.
We are working on improving data retrieval, and have made some progress. Further improvements are planned. There are several backend features (e.g. whole file checksums) that would help insert-on-demand filesharing apps, which we will probably implement in 0.9. Also see “write a killer file-sharing app”.
One option would be to allow people to choose to permanently host content.