According to the folks at nanog:

Cogent is experiencing 2 fiber cuts in the north/southeast-US. The locations are: Between Houston and Tampa (Southeast) Ticket #347277 Between Philidelpha and DC (Northeast) Ticket #347375

As a result we have seen about a 20-30% decrease in traffic. We will keep you updated as things develop.

We'll be bringing the main server down for a very short time, around 6:30am this morning to install a disk. This outage should last no longer than 2-3 minutes.

Around Midnight tonight we'll be doing a network test to check out our routers and our uplink to the internet. We noticed some potential problems earlier in the day and scheduled a test immediately to pre-empt any loss of service. Thinkgs might slow down for 10 minutes or so, then should go back to normal.

Okay here's the damage report: It looks like around 10am eastern standard time, our domain libsyn.com ceased connecting to our site. We checked our system, at first we thought that the dns issues may have been related to the previous late night upgrades. We soon found that it had nothing to do with problems in our data center, and we contacted our Registrar to see what was happening. This registrar currently hosts libsyn.com, libsyn.org, libsin.com, liberatedsyndication.com, etc. An hour and a half later on the phone we were informed that it had to do with "core system problems" on their end. We were told to wait. We continued to look into possible dns disconnects with our system. Around, 2pm upon two additional phone calls, we were informed that our account was on hold due to a complaint regarding an invalid whois entry. Even though the first 4 people we talked to today didn't seem to have the information that we were being suspended, this is where we must take some responsibility for today. The notification emails that the whois information was invalid never reached us.

We then spent the rest of the day pushing on the registrar to accelerate reactivation of the domain. Things started coming back around 5:30pm today. The lessons have been learned, we are changing registrars.

We appreciate all the patience that you guys have given us today.

Hey Guys,
We are having a DNS issue that may be out of our hands. We have contacted our registrar who responded that we may be affected by issues with some of their "core servers" that announce the IP address for our domain. We are working to resolve this issue and will keep you guys updated.

http://libsyn.org will get you to the site right now, but unfortunately, that is not going to help your listeners that are having problems.
Update: Files are now being served via the .org domain. This does not help your subscribers, but may be of some assistance.

Red letter day in libsyn history. To celebrate, we bought it a new switch and a couple more delivery nodes. I'm all out of being funny right now. Read the soundoff post if you want humor.

Thanks for sticking with us folks. We know it's been up a roller-coaster year. If we didn't love hearing your voices screaming our names (mostly) in pleasure and (sometimes) in pain, we wouldn't get out of bed in the morning. Now that we got people pushing video, we can't wait to see where soapy will turn up next!