My team has built a fun little feature: Add a hashtag to your photo (e.g. #PaintUSA), share it on Google+, and we’ll automatically apply the country flag of your choice. My colleague Alex Powell (who recently joined us from Dreamworks) did this work and writes,

• Take a photo of yourself and up to 5 friends who’d like their faces painted
• Share it on Google+ with the hashtag #PaintUSA or any other country in the knockout round (list of hashtags)
• After a few minutes check back in your stream. The faces will be painted with the country flag of your choice

Give it a shot and let us know what you think!