Dunno if this is the right forum for this, but anyways. This has been going on since 14th of March:

http://gigaom.com/2008/03/14/the-tel...-web-for-many/

Excerpt:

Quote Originally Posted by gigaom.com
Swedish telecom operator Telia and U.S.-based connectivity provider Cogent Communications have gotten into an ugly spat and have stopped interconnecting, according to some of my sources in the telecom business. What this essentially means is that Telia’s DSL customers could have trouble seeing Cogent-connected web services. Telia, now part of TeliaSonera is one of the largest networks in Europe.

The bickering could be because one of the two parties feel they need to be paid for the traffic they are sending. I am looking into this and have emails out to all my sources in the bandwidth business, and will update accordingly. (If you have any information, drop me a line.)

Cogent had previously gotten into a slugfest with Level 3 Communications. Cogent’s stance towards Telia is hypocritical. Here is a press release they issued back in 2005 when complaining about Level3. As a reader points out, Cogent has been involved in such spats with other carriers as well. OpenTransit (France Telecom), Teleglobe, ATDN are some of those who have had Cogent issues.
Cogent also blocks third-party transit between the two networks; in practice this means that TeliaSonera users have no way of reaching single-home Cogent sites except slow and ponderous anonymous proxy servers. Direct connections (required for online games and most downloading) are impossible. Many websites and online games are affected; the entire Stardock network is under Cogent, for example.

Cogent has been involved with these kinds of tactics before, and this would further enhance their reputation as a cheap but risky provider. Disrupting internet traffic for millions of people to add weight to negotiations is something that probably wouldn't cross everybody's mind. Good honest capitalism or underhanded scheming?