vs. 
I noticed yesterday that I could not visit The Daily WTF or Podomatic. Today I started investigating and __henke__ in #data on irc.freenode.net told me that my ISP Telia and Cogent Communications had stopped peering.
Related links in approximately chronological order:
- The Telia-Cogent Spat Could Ruin the Web For Many (gigaom.com)
- Cogent depeer’er Telia (sunech.com)
- Amerikansk operatör stoppar Telia (idg.se, in Swedish)
- Update Telia och Cogent i uppgraderingsbråk (idg.se, in Swedish)
- Update Cogent: "Telia bröt mot kontraktet" (idg.se, in Swedish)
- Update Information om stängda förbindelser mellan Telia och Cogent (telia.se, in Swedish)
- Update Cogent CEO: Peering Breakdown Is Telia’s Fault (gigaom.com)
The networks affected are AS1299 (TeliaSonera International Carrier, TSIC) and AS174 (Cogent Communications).
Update It seems like www.webservertalk.com is unreachable for the same reason.