Cogent and Level 3, two of the world's largest ISPs are having a dispute. As a result, users of Level 3 may not be able to reach sites that make use of Cogent and users of Cogent may not be able to reach websites that use Level 3. Stardock, Betanews, WinCustomize, Neowin.net, deviantART, and many other sites use Cogent. So if someone isn't able to connect to Stardock or any of its sites, this may be a reason.
But it speaks to a larger issue -- could the Internet eventually be broken up with us all at the whim of large corporations?
Links:
View: Cogent's Side of the story