I think strategy/tactics for getting initial users depends on what you're selling and who you're selling to.
Best advice I can give would be to figure out who needs this the most, find someone like that in your area, and start a dialogue with them. 1-on-1 selling definitely isn't scalable, but you can ask them things like 'how do you find out about new services you can use for your business', 'what blogs/news sources do you read', 'who's an influential person in your line of business' etc... Once you have this info it will be obvious (hopefully) where you should be focusing your attention.
Reading up on lean startup methodology (if you haven't already) would help get you up to speed on this sort of process. Good luck!
Best advice I can give would be to figure out who needs this the most, find someone like that in your area, and start a dialogue with them. 1-on-1 selling definitely isn't scalable, but you can ask them things like 'how do you find out about new services you can use for your business', 'what blogs/news sources do you read', 'who's an influential person in your line of business' etc... Once you have this info it will be obvious (hopefully) where you should be focusing your attention.
Reading up on lean startup methodology (if you haven't already) would help get you up to speed on this sort of process. Good luck!