www.adriandenning.co.uk is one of the best sites to check out for music reviews. Adrian's reviews were the first I ever came across from an independent critic, I recommend you check out his page!
www.victoriahathaway.webs.com is a great little site recently started up for film and movie reviews! I recommend it whole heartedly :)
http://starling.rinet.ru/music/index.htm will take you to George Starostin's reviewing site. It's no longer updated but I recommend that you check out his site as it's one of the best!
http://donignacio.com/ will take you to The Don's! The site has currently been undergoing some major surgery and is well worth checking out!
And last but not least, www.markprindle.com, your number one site for comic reviews from the grandaddy of online critics!