But if the rights issue wasn't there, wouldn't Google build a competitor in a few days? It's a fairly simple website to make, and lyrics websites do a ton of traffic.
Guess what? It's now discontinued: http://www.google.com/sidewiki/ It's not trivial to build annotation platforms that are both compelling and easy to use. Hat tip to RapGenius!
http://techcrunch.com/2011/11/10/google-buys-contextual-rich...