The so called remittance market seems to have not taken off.
Maybe tourism will be the next. Tickets, pubs, ATM's and hotels.
Remittance market's so damn difficult to tap into because they're inherently "foreign." I don't assume people paying remittances have a lot of time on their hands. Seems like there's not really a route for Bitcoin awareness to spread outside word of mouth.... maybe producing materials in multiple languages which could be passed around might help. It's definitely a place for grassroots, but it seems like it'd need a massive push. For example, US-Mexico remittance would need offices in both countries organized as non-profits, where they help people send and receive money without fuss and fees. ATMs and ATMs with internal user wallets could be immensely helpful here since it could allow this non-profit to only need to exist for a few years as a kind of stop-gap while also being an educator.
The best bet might be a NFP talking to employers in appropriate areas about how they can help their employees get more out of their paycheck, and how the employer can build good will in the process. Mass mailings targeting employers might also be cost-effective...