This is a huge, webcast festival from all around the world. It being broadcast for free for all to see on the web.
Here is a bit of info
http://www.irocke.com/
I'm looking forward to the Nine Inch Nails show this evening. The few songs I saw from Lolapalooza last week were excellent.
The festival spans all gengre's so have a looka nd see if there is anyone you may like to see.