Yahoo is down currently, thanks to some oh-so-wonderful (please note the sarcasm there) hackers. From what a friend told me, a lot of big ones got hit.

Quote from the conversation "the company that puts out ALL of the major sites, including Microsoft, Yahoo and others was assaulted somehow. either through a virus or something. so like almost all of the major sites out there are down. like I can't get onto Yahoo.com at all."