http://s.ytimg.com/yt/img/doodles/royal_wedding-vflZ8V2om.png

Also
http://www.youtube.com/theroyalchannel?feature=ticker

2011-4-29
"The Wedding of Prince William of Wales and Catherine Middleton"
http://www.google.com/search?q=Royal+Wedding&ct=royalwedding11-hp&oi=ddle
http://www.google.com/logos/2011/royalwedding11-hp.png

The first hit of 'royal wedding' now:

http://officialroyalwedding2011.org/

There was a special mini logo (rings) included to the first result line when searching yesterday. Link available?

http://farm6.static.flickr.com/5185/5669083263_b929fdc16f_b.jpg

Bing yesterday:

http://cdn.brafton.com/wp-content/uploads/2011/04/bing-220x118.png

Yahoo! yesterday:

http://cdn.brafton.com/wp-content/uploads/2011/04/2011-04-29_1006-220x123.png

Source of B and Y screenshots
http://www.brafton.com/news/google-bing-yahoo-and-aol-honor-the-royal-wedding-800496539

Another source for the royal rings ;-)

http://4.bp.blogspot.com/-QXklpI84ZqA/TbslXBg0ZJI/AAAAAAAAH9U/9lzAMfg4bYA/Royal+Wedding+OB.png

:)

http://www.guardian.co.uk/technology/blog/2011/apr/29/royal-wedding-google-doodle-streetview

:)