As someone asked earlier, isn't the blockchain going to be enormous if FAI becomes popular? Is there at least some concept for how to deal with this, or is the price of posting going to rise enough to discourage casual use?
Depends on what you would consider a solution. A simple solution to make transacting FAI more accessible would be creating a client that would still have wallet functionality without having to be a full node. Having full access to FAI's features without having to store the blockchain would be more tricky though. Since FAI is something new, it's not like someone could just alter the code of a lightweight bitcoin wallet and create a "lihtweight" FAI client with all functionalities so simply.