At least for now. I have to believe that this metric will at some point play a role. However at this point, not so much. Sorry.
On the other hand, having people engage with your G+ Page is always great. Lots of side benefits as well. Someday G Local search will pick it up (tomorrow?), then you'll be WAY ahead of the crowd if you have a reservoir of +1's built up.
New advertising option:
A review of your product or service posted by a Sterling Sky employee. This will also be shared on the Sterling Sky & LSF Twitter accounts, our Facebook group, LinkedIn, and both newsletters.