Hey everyone - I made an initial version of this at the TC Disrupt Hackathon, see here: Memstash. It was build in 20 hours so it's obviously very very MVP, but we ended up winning trips to Paris as well as getting over 50k visitors and 5k signups (mostly via a Hacker News post).

I think that the response generally proves that there are definitely people interested in this sort of thing - but return traffic hasn't been great, which is understandable given how basic the functionality is. Anyway, would love to get your feedback on what I've built thus far.