A few weeks ago, Google announced the support of rich snippets in the search results. Most SEOs and Webmasters said they would give it a try and I did also. So far, none of the sites I have tried it on, show the rich snippet data.
I do wish there was a way, maybe in Webmaster Tools, to verify that we did it right and what it might look like once it shows up in the search results. I know Google does not guarantee it will show up in the search results. But it would be nice to know it is not showing due to technical reasons versus authority reasons.
In any event, a Google Webmasters Help thread asks if the rich snippets will also show in Google localized versions. Would rich snippets show in the UK or Canada or Israel?
It appears that rich snippets currently only show in Google.com, and not other Google properties. Compare:
google.com/search?q=site%3Ayelp.com+pizzeria
vs
google.co.uk/search?q=site%3Ayelp.com+pizzeriagoogle.ca/search?q=site%3Ayelp.com+pizzeriagoogle.co.il/search?q=site%3Ayelp.com+pizzeria
As you can see when you currently click through, the rich snippets only show in Google.com.
In any event, it would be nice to see if you can see how the rich snippets would appear and if you have technically set them up correctly.
Forum discussion at Google Webmasters Help.