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I am curious to know how many alphanumerics can "ride along" a BTC transaction ("Public Note").
Here is an example (hash code for this transaction) of a small BTC transaction with a Public Note (perhaps best viewed at blockchain.info):
798b90badb81492b35ac2f98b1d6b742edd3da490a99f7b48588655f91ad6841
Here is the message (about 39 characters, went through OK):
HowManyCharactersCanRideAlongAsALabel?
EDIT:
Perhaps using hash codes as the Public Note is what
factom.org has in mind for using the blockchain to store their large quantities of information without making the blockchain too bloated (?)
factom.org is an interesting little start-up.
