Search by drawing is a wonderful feature and now you can post search results by your drawing to Twitter and Facebook. Sign in before starting drawing a picture. Upload your drawing and click 'Publish'. You can see 'post to Twitter' and 'post to Facebook'. Click them and your search results by drawing is posted to Twitter or Facebook.
Users who have joined in private beta test might remember the ranking page of search by drawing. There is no ranking feature in current system, but your search results can be shared with others and would be retweeted.
You can also apply for 'Tweet with us Win an iPod touch campaign' with your search results by drawing. Try search by drawing and publish your results!