[nieksand]

Building first and talking after isn't likely to end well, especially for B2B. Trying to buy online ads after the fact is not likely to get you anywhere... you are just one of a million voices screaming out in a crowd.

If you don't feel comfortable talking, consider partnering with somebody who does.

[FastMonkey]

The B2B startups I've seen that grew into something real all had did some consulting in their area at the start. It gave them a broader experience in the problems they were trying to solve, and helped them build relationships with their first customers. I'm not in SF or anything though, so things might just be a little different here.