Here's a link you can save and use if you're having trouble getting into this site or any other, it tells you if the site is down for everyone, or just for you. If just for you, a good thing to do is clean cookies & temp files. If that doesn't work, retype the address in the addressbar instead of using your bookmark... and sometimes you just have to redo a bookmark.
http://www.downforeveryoneorjustme.com/