I'm not a big Jay-Z fan by any account, but with all the boo-hah from Noel Gallagher around him being on the bill for this year's Glastonbury, I decided to take a look at his performance and needless to say he absolutely killed it. His opening rendition of 'Wonderwall' was classic too..
BBC Radio 1's got some vids up on their site (in fairly decent quality I might add) of various performances & interviews here. Give it a check if you haven't already as well as the seriously insane lineup.