"Turning location into communication" left me confused. I think it would be more helpful to say something like, "Get answers from local experts."
Also, your call to action is weak. "Join now, I'm an individual/business" feels like an obligation. It might be more helpful to say, "Ask your question" and/or "Answer questions."
A question I have is:
"Get answers from local experts" only covers 50% of our product offering as we see it, and leaves out the fact that we are very focused on integrating external APIs to add implicit value for users. Our position is that this is really critical, because the problem in the past that has sprung up time and again with services similar to ours is that in low-density population areas functional, real-time Q&A is extremely difficult. Or do you think that this doesn't matter?
As Robert noted we plan to make adjustments. Early next week we are adding the functionality for users to ask questions directly on the site, without having to use the iPhone app. Your copy, "Ask your question," might be a good fit there.