I would launch one of these four to five business models to help push crypto-currency technology forward. I've seen some indications of a few of these business models being attempted, I've not seen a true player break out with a solid strategy yet. If anyone has heard of any of these, please let me know as I'd like to help where I can. If not, I will entertain leading such an effort. 

International Trade: I've spent the last 4 years trading a single food commodity internationally, and each container is roughly worth $250k. Thousands of these containers are crossing international waters, and there is more than one food commodity. And that's food. Obviously mining, timer, electronics, etc... are all sent to and fro using containers. There is a tremendous amount of paperwork, banking, trust, and often regulation behind trade that makes it ripe for disruption. I saw one company going after this concept a while back, but their approach did not strike me as the right one. The same concept could also be applied to consumer delivery services (UPS/FedEx/DHL/EMS) once the blocks can handle the transaction volume.

Domain Trading: The market for domain names continues to grow and their are a lot of speculators world wide. Developing a system that would replace Escrow.com and the other major escrow companies seems a natural fit, as it would not only remove the human judgement and international politics elements, but also will likely find efficiency that is not had now. More importantly, a market for LANDLORDS and RENTORS could be developed by putting domains in "permanent escrow" that guarantees the RENTOR future control of the domain as long as they continue to make payments, and the LANDLORD future control of the domain should payments fail to be made. This is especially helpful when considering all of the domains out there worth less than $100k. The cost of potential litigation just doesn't allow one to easily and safely lease a domain. A whole new industry could be developed.

Mortgage Market: Today, most homes are purchased with a mortgage from the bank. Banks are happy to loan money when they are earning hefty interest up front. Most people move in 5 years, a new mortgage is arranged, and the interest starts over again. Back when the US housing market dropped underwater and hundreds of thousands of families were stuck in a home where their mortgage was worth more than their house, I developed a concept where mortgages could be "forwarded" to a new home. So if one were to upgrade, their negative equity position would increase. If they downgraded, their negative equity would decrease. Ultimately, the idea was to enable people to move and continue making payments on their mortgage, but detach the mortgage from a specific home. Homes have value, mortgages have value. They do not to be attached to each another as long as the market is free to determine value. Unfortunately, all of the companies that offered mortgages were quickly consolidated and the already lofty idea had no shot at success without a huge amount of political clout. Bitcoin changes this.

Advertising/Marketing: As micropayments become possible, using Bitcoin or another crypto-currency will be very useful in connecting brands with their customers. This can be accomplished many ways, and not only will it be good for the brands to connect with their consumers, as an industry we start to teach the masses about crypto-currency. I have a few contacts throughout the ad agency industry and would enjoy educating them on ways to make Bitcoin work for there clients. This idea is probably best left for a time when the Blockchain can handle the volume.

As mentioned, I've seen discussion about these ideas, or concepts skirting these ideas, but none from what I can tell approach the market like I would.