I'm on Bright House cable with Earthlink and I noticed some downtime for a few minutes. On Twitter it appears there are nationwide problems. The problem possibly appeared DNS related for me so I switched to Google Public DNS within my router.
I'm unsure if it's a coincidence but upon doing that things are fine.
Here's the info for switching if someone needs it:
»developers.google.com/speed/publ ··· cs/using