Are you need a Google+ search engine since Google+ already released ? Well a guy Rich Knight developed a search engine for Google+ called ‘Google+ Search‘ to Google+ users.
can search posts only,profiles only,posts from Buzz and Posts from Google Reader
.Rich Knight using ‘Google Custom Search’ feature and performs an advanced Google search based on just showing links from the plus.Google.com domain.
If you want contact with the author, can be added to his Google+ Profile within your circle.
PS:Now can get Google+ invite from Techgravy.net