Google+ is getting more and more popular with lots of updates being posted daily. Google+ has a search option, but the search is limited only to searching people on Google+. If you want to search for any posts, images, posts from Google Reader, Buzz etc, you can try out Search Extension for Google Plus on Google Chrome. You can enter the search option in the box and it throws out results and filters the results into different categories.
The results page is neatly arranged into tabs featuring all results, results from Google+ posts, profiles, Google Buzz and Google Reader.
The extension is useful since Google+ does not have an option to search posts.