Once an author has diligently implemented authorship markup and tested it using the Google rich snippets testing tool, Google will need to recrawl existing articles before an author’s photo and byline can conceivably show up in search results. In reality, Google is still piloting authorship markup; in November 2011 Google finally added the phrase “Google doesn’t guarantee to show author information in Google Web Search or Google News results†to their documentation. Translated, that probably means that only “authoritative†sites, those with lots of quality incoming links and other signals like frequent updates, are candidates for consideration, and only for searches in English on Google.com. You can test here: http://www.google.com/webmasters/tools/richsnippets The recrawling process should not takes longer than 48 hours.