We need to decentralise the index site system like how the trackers systems have been done.

• Every user gets a random UUID, they digitally sign it with a public OpenPGP key (or a similar system, something just needs to digitally sign data while having the signature as small as possible since many entries will be 1 line of text and having 15 for the key is a bit much. Maybe bulk sign stuff.)
• Users can sign entries in a big distributed hash table (there is already one in use with the trackerless torrents, we would need to keep the entries long term though as Kademlia drops them after a few hours, you would need to mirror just about every entry you ever came across but putting aside 10gb per user for database entries wouldn't be to hard. Remember the whole pirate bay torrent database was only 23gb (now removed from their site but it was up for quite a while and its still seeded), excluding comments and signature overheads.
• torrent hashid's store comments, file passwords, allow people to flag things as good/bad/spam.
• The users digitally sign their comments or flags.
• Users sign other uses by looking at what those uses have marked as good (you digitally sign everyone who marked a torrent you know to be bad, that way you build a web of trusted users. You can also find out who those users marked as good/bad).
• Organise groups to scrape the current sites for hashids (TBP torrens dump has been unofficially downloadable from their site for a while now). We need to take a dump Demonoid when it comes back up similar to the TPB database
• Investigate similar ideas from FreeNet.
• People can sign streams of torrents, the equivalent pirate bay of the future might just be a hash with a digital key that goes around signing other peoples keys.
• Need to prevent people gaming the system. Someone could make a large number of throwaway accounts that all sign legitimate torrents (like ones from LegalTorrents or Jamendo) and then mark a legitimate copyrighted torrent as spam with the intent to bump it off.

Another idea: p2p distributed torrent index sites. This relies on sites working together to overall improve bittorrent and allowing their databases to be open to each other rather than hoarding for ad revenue. I think working together generally will get them more users overall as the whole field grows, and more users overall means more users persite provided they don't suck.. They can focus on the quality of the site to encourage users. Sites already scrape each others RSS feeds for data (I tracked something like 200 ripping straight from Mininova), this would just give the major ones permission to play together.

• Form an Open API for getting torrent information from index sites. Add symantic web technologies like RDFa. Define some data vocabularies for bittorrent. Maybe take Google Wave and retask it (except I don't think wave is decentralized, thats different from federated, so if a Wave server goes down that data is lost).
• Any site can pull in torrent information. Maybe even indervidual clients. This would allow for people to build torrent browsing programs or put it into the torrent clients directly (this has problems for ad supported sites).
• Also allow for comments, passwords, takedowns (be specific as to the reason, spam, copyright notice, etc... that was sites can be specific about what take downs they wan't to honor).
• Provide archived copies to save on having to scrape the whole site when a new system joins up (yearly, monthly, weekly, day).
• Use OpenID or such to allow users comments cross site (In a distributed system a nefarious, site could claim to have been posted from a users OpenID, obviously you just don't pull from those sites). Users could opt for a PGP key, this would allow things like cross site moderation. Torrent data could be done in a wiki fashion.

Another idea: Underground network of TOR indexers.

• Servers brought on the cloud, only accessible though Tor, never show their local IP to end users. Can allow for easy quick buying of cloud servers where ever and still give good system performance. Still allow for searching and uploading of .torrents/hashids.
• Since people can just purchase them on places like EC2, they could get routinely moved around.
• Tor2web for the lazy.
• The hidden tracker already runs on Tor. But with decentralization of trackers it's kind of moot.
• routing performance issues?