Looks like they did an update on their host machines. The update unfortunately meant that many hosts marked linodes as being shutdown, when they should have been marked up.

This meant many linodes were unreachable (No network).

linode.com was extremely slow also, don't know if it's related.

They're rebooting hosts to fix the issue, which is just horrible.

Here's a copy of the original post, since their own website and forum are slow/offline:

http://kovaya.com/linode.html