I'd love to see this happen, but direct file storage isn't steemit's strength IMHO..

What it does give us is an awesome web-of-trust and verification network where we can discuss/disseminate information and refer as needed to PDF files etc using IPFS hashes.

People can vouch for specific files as being safe+interesting by sharing the IPFS hash , and that specific hash will ALWAYS be safe and ALWAYS in the blockchain.

We just need a bunch of volunteer IPFS nodes to get things started, then it would work like a big torrent swarm ..