Definitely come by the discord server (yes ironic 😂) and join the OpenSeed conversation. If Hive users were to adopt such a standard we would be happy to integrate it into OpenSeed. That being said, we have given a lot of thought to this feature, and solicited tons of user and developer feedback on their preferred implementation and found that there is not much demand for an on-chain implementation. After all, Hive/Steem has been around for 4 years and such a solution has been possible since day one. One should consider why no such standard has been adopted after all these years. I believe @therealwolf developed such a standard for Steem Chat, but the fact that this project was not successful should be viewed as a warning sign. Most experienced Hive developers are looking for ways to remove data from the blockchain, not bloat it further. That's why we have off-chain posts and comments in OpenSeed as well. It is my belief that a decentralized, public, immutable database is not the right way to store messages and that a distributed, mutable database is far superior. It is understandable why one would be tempted to use Hive for this purpose as it is difficult to bootstrap such a distributed network, however, that is exactly what we are doing with OpenSeed. Sorry to rain on your parade, and it's entirely possible that I am wrong in my conclusions, I just wanted to inform you of my experience and the logic behind our decisions so that you can plan accordingly.