Should be on BBC Sport. I haven't watched a match on the website since the Confederations Cup last year, so I'm not sure it starts as soon as the game kicks off or a few minutes before. Should start streaming somewhere on the site any minute now though. If I can't get it working, Radio 5 will have to do I guess. Could be fun seeing what group of fans Alan Green pisses off next on it anyway.
edit - By the look of it, it's just the text updates and not the actual game. There's a link to the Radio 5 stream
here though.