I don't have one of their products, but I saw a lot of posts pop up about this this morning.

Posts coming up on various forums about an automatic firmware update that hit the wire last night that has botched up communications between the LAN and WAN sides of the router. Local devices are communcating fine on the LAN side (can pull up the router admin page and map drives and such)--but nothing is getting to the modem, so no internet access. Users are having to connect directly to the modem for internet access.

If you have a Belkin and it has not updated itself yet, may want to disable the automatic update and check in with Belkin to see when the issue is fixed. Reports were coming in that the site was overloaded, and phone support also seemed to be overwhelmed as well. Hopefully it is something simple that can be fixed soon.