Crowd-sourced annotation of all texts.
Rap Genius is your guide to the meaning of rap lyrics
You can listen to songs, read their lyrics, and click the lines that interest you for pop-up explanations – they have thousands of canonical rap songs explained (2Pac, Notorious B.I.G., Jay-Z – even the beginning of the Torah..)
Their aim is not to translate rap into “nerdspeak”, but rather to critique rap as poetry
Who writes the explanations?
Anyone can create an account and start explaining rap. Highlight any line to explain it yourself, suggest changes to existing explanations, and put up your favorite new songs.
If you make good contributions you'll earn Rap IQ™, and if you spit true knowledge, eventually you'll be able to edit anything on the site.. just like a hip-hop Wikipedia..
There is great relevance of this tool to enterprise technologists. Here is more: http://ctovision.com/2012/10/rap-genius-coming-to-your-enterprise/